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Weather

for Killeen, Texas

Updated 2017.03.20


Comparison


Year High Low Precip
Inches
Wet
Days
100+
Days
Cons.
100
90+
Days
32
Days
-32
Days
HLA
HLHLAHLHLA
20101083394.5891527.532.89”64312512730069.59
201111121100.0901417.510.50”41883315526270.88
20121073994.0822332.028.35”10038211429072.57
20131072694.5822123.529.72”8029711823268.81
20141032991.5801524.524.83”9025711832368.62
20151063394.0812129.046.80”113331312415069.90
20161083294.0821826.536.86”115271411814171.17
2017301626.08.25”2300141
Ave.107.1430.4394.6483.7118.1425.7929.99”86.1438.7117.14128.8621.291.1470.22

NOTE: Averages updated through 2016.



HLAs


At some point, I decided the easiest/best way to compare days or months from different years was to compare what I’m calling the “HLA” (high-low average). For example, both days might have a high of 100F, but if one day’s low was 80 and the other day’s low was 70, their respective HLAs would be 90F and 85F.

• “Var.” refers to the variance between the highest and lowest HLA of each column. The winter months are the most variable; summer months the least. February varies more than any other month, while September varies the least.
• Averages and Variances are up to date through Jan. 2017.



Ranked vertically, using each month’s average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECYEAR
201048.0346.9558.8568.4278.3485.1085.6990.0382.0272.4862.6554.9269.59
201146.6952.1663.5074.1876.8486.9390.4893.2383.5871.7461.1249.0670.88
201256.3158.6767.1574.8779.7385.5586.6388.1680.6271.5264.3357.2672.57
201351.4856.1361.1566.1274.7485.2885.4087.2783.1571.0255.7547.5068.81
201448.8251.2558.4469.9874.7382.6885.1387.4581.5274.6955.2353.2768.62
201547.6949.7559.5871.2775.3283.0787.0288.4883.8074.6960.2856.5269.90
201650.4559.0065.6669.9574.4284.1288.4285.5682.5775.1465.1353.3271.17
201754.8963.79
Ave.50.5454.7162.0470.6876.3084.6886.9788.6082.4773.0460.6453.1270.22
Var.9.6216.848.718.755.314.255.357.673.184.129.909.763.95


Ranked horizontally, using overall average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECYEAR
201048.0346.9558.8568.4278.3485.1085.6990.0382.0272.4862.6554.9269.59
201146.6952.1663.5074.1876.8486.9390.4893.2383.5871.7461.1249.0670.88
201256.3158.6767.1574.8779.7385.5586.6388.1680.6271.5264.3357.2672.57
201351.4856.1361.1566.1274.7485.2885.4087.2783.1571.0255.7547.5068.81
201448.8251.2558.4469.9874.7382.6885.1387.4581.5274.6955.2353.2768.62
201547.6949.7559.5871.2775.3283.0787.0288.4883.8074.6960.2856.5269.90
201650.4559.0065.6669.9574.4284.1288.4285.5682.5775.1465.1353.3271.17
201754.8963.79
Ave.50.5454.7162.0470.6876.3084.6886.9788.6082.4773.0460.6453.1270.22

January averages as the coldest month. Once, February was the coldest, and once December was the coldest.

Typically, August is the hottest month every year, and July is second (they switched in 2016). June is usually the third-hottest month, but in 2015 September was warmer. While 2011 saw our hottest summer, 2012 was the warmest year overall — with January through May and November-December all being the warmest to date (February and November were overtaken in 2016). 2014 saw the coolest spring and summer, and was the coolest overall.



Yearly HLA averages, 2010-2016



  
Larger       •       2010-16 Trendlines       •       Larger



Jan & Aug
Larger

Februaries
Larger

Marches
Larger

Aprils
Larger

Mays
Larger

Junes
Larger

Julys
Larger

Aug & Jan
Larger

Septembers
Larger

Octobers
Larger

Novembers
Larger

Decembers
Larger



100-Degree Days


Days per months that reached/exceeded 100F.

• Averages are up to date through Feb. 2017.



ranked vertically, using each month’s average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECTOTAL
2010000001326100031
2011000041330301100088
2012000007719500038
2013000004714400029
2014000000616300025
20150000001118310033
20160000011112300027
201700
Ave.00000.573.7110.7119.294.290.140038.71


ranked horizontally, by overall average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECAve.
201000000132610002.58
201100004133030110007.33
201200000771950003.17
201300000471440002.42
201400000061630002.08
2015000000111831002.75
2016000001111230002.25
201700
Ave.00000.573.7110.7119.294.290.14003.226

In August, more than half the days can be expected to hit 100F or higher. That’s happened once in July as well, but in no other months. 100-degree days generally begin in mid-June* and always last through at least early September.

(* In 2010, they began in May; in 2014 and 2015, they didn’t start until July.)


EarliestSpanLatest
2010June 2371 days Sept. 1
2011May 25128 days Sept. 29
2012*June 595 days Sept. 7
2013June 2671 days Sept. 4
2014July 767 days Sept. 11
2015July 1392 days Oct. 12
2016*June 2192 days Sept. 20
2017
Ave.June 2288 daysSept. 17
* Leap years



Shows the span of 90- and 100-degree days each year
See Larger size (1600x743)


90-Degree Days


Days per month that reached/exceeded 90F

• Averages are up to date through Feb. 2017.



Ranked vertically, using each month’s average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECTOTAL
201000001627273120510127
2011001141730313127400155
201200072029313120310142
20130000728263023400118
20140003724283018800118
20150002124313027900124
20160021425312523700118
201701
Ave.00.130.433.8610.2926.7129.2929.7122.575.710.290128.86


Ranked horizontally, using overall average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECAve.
20100000162727312051010.58
201100114173031312740012.92
20120007202931312031011.83
201300007282630234009.83
201400037242830188009.83
2015000212431302790010.33
201600214253125237009.83
201701
Ave.00.130.433.8610.2926.7129.2929.7122.575.710.29010.74

As expected, August leads the months in 90-degree days, though July and June are close behind, with September a more distant fourth place. May and October always see 90-degree days as well, and April usually does too. It’s happened three times in March, twice in November, and once in February. To my knowledge, there has never been a 90-degree day in January or December.


EarliestSpanLatest
2010May 4182 days Nov. 1
2011March 26206 days Oct. 17
2012*April 1215 days Nov. 1
2013May 17149 days Oct. 12
2014April 24185 days Oct. 25
2015April 13187 days Oct. 16
2016*March 14220 days Oct. 19
2017Feb. 23
Ave.April 8197 days Oct. 22
* Leap years



Freezing Days (low)


Days per month in which the low was equal to or less than 32F. (It is extremely rare for a daily high to be as low as 32F.)

• Averages are up to date through Feb. 2017.



ranked vertically, using each month’s average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECTOTAL
2010129000000003630
20111010100000002326
20121100000000079
2013800000000011423
20141210300000005232
201556200000001115
201662000000000614
201740
Ave.7.254.750.8600000001.715.5721.29


ranked horizontally, by overall average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECAVE
201012900000000362.500
2011101010000000232.167
20121100000000070.750
201380000000001141.917
2014121030000000522.667
20155620000000111.250
20166200000000061.167
201740
Ave.7.254.750.8600000001.715.571.773

On average, January has more days that see freezing temperatures than any other month. December is second with February very close. November usually sees freezing days (but not always) and March sees freezing days about half the time.


Last Freeze
of Winter/Spring
SpanFirst Freeze
of Fall/Winter
2010Feb. 24256 days Nov. 6
2011March 6244 days Nov. 4
2012*Feb. 12304 days Dec. 11
2013Jan. 31301 days Nov. 27
2014March 4255 days Nov. 13
2015March 6262 days Nov. 22
2016*Feb. 7306 days Dec. 8
2017Jan. 8
Ave.Feb. 15280 days Nov. 22



Freezing Days (high)


Days per month in which the high was equal to or less than 32F

• Averages are up to date through Feb. 2017.



ranked vertically, using each month’s average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECTOTAL
20100000000000000
20110200000000002
20120000000000000
20130000000000022
20140300000000003
20150000000000000
20160000000000011
201710
Ave.0.130.630000000000.431.13


It is exceedingly rare for any day to never rise above the freezing mark (32F); we average 1.13 such days per year. Since 2010, this has only occurred in February and December — until 2017, when January saw such a day. Five of the nine such days we’ve seen in eight years occurred in a single winter: 2013-14.




Precipitation


• Averages are up to date through Feb. 2017.



Ranked vertically, using each month’s average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECTOTAL
20104.522.954.123.370.020.064.390.0211.750.070.790.8332.89
20111.840.280.020.104.590.500.000.000.280.200.352.3410.50
20121.311.4910.730.493.693.081.022.063.810.280.010.3828.35
20133.601.281.611.314.911.055.950.512.594.052.020.8429.72
20140.420.271.432.156.663.431.610.252.512.123.290.6924.83
20153.180.632.972.9011.114.740.001.050.0411.595.902.6946.80
20160.251.294.216.216.022.210.668.011.810.533.831.8336.86
20173.333.52
Ave.2.311.463.582.365.292.151.951.703.262.692.311.3729.99


Ranked horizontally, using overall average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECAve.
20104.522.954.123.370.020.064.390.0211.750.070.790.832.741
20111.840.280.020.104.590.500.000.000.280.200.352.340.875
20121.311.4910.730.493.693.081.022.063.810.280.010.382.363
20133.601.281.611.314.911.055.950.512.594.052.020.842.477
20140.420.271.432.156.663.431.610.252.512.123.290.692.069
20153.180.632.972.9011.114.740.001.050.0411.595.902.693.900
20160.251.294.216.216.022.210.668.011.810.533.831.833.072
20173.333.52
Ave.2.311.463.582.365.292.151.951.703.262.692.311.372.499

May is the wettest month, followed by March. February wass the driest month until 2017, when its average rose above that of December. Now December is the driest month, followed by February and August.


Comparison of annual rainfall totals, 2010-2016


Days With Precipitation


• Averages are up to date through Feb. 2017.



ranked vertically, using each month’s average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECTOTAL
201061011102171723464
2011541281001241341
201269126259766716100
2013585982457810980
201448871110658461390
201512712152282468136113
2016641015195515741312115
2017106
Ave.6.757.008.439.1413.575.144.435.146.005.007.149.0086.14


ranked horizontally, using overall average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECAVE
20106101110217172345.33
201154128100124133.42
2012691262597667168.33
201358598245781096.67
20144887111065846137.50
2015127121522824681369.42
20166410151955157413129.58
2017106
Ave.6.757.008.439.1413.575.144.435.146.005.007.149.007.18

On average, May has more rainy days than any other month, and April is second. Oddly, December is third, despite it being a very dry month. July averages the fewest rainy days. October, June, and August are not far behind.



Daily Records


For the eight years I’ve covered Killeen’s weather, we’ve seen daily record lows, but quite a few more highs. (In a few cases, we’ve broken a record since we’ve lived here, and then broke the same one again; I don’t count those twice.)


Daily record highs held by 2010-17: 165
Daily record lows held by 2010-17: 42

Click here to see the list of high/low records for each day.

So, 45.08% of all the days in a year saw record highs set in 2010-17, while only 11.48% of days saw record lows set during the same time period. Weather experts say it’s normal to see some record highs and lows set each year, since our records only go back a century or so. It is not normal to see nearly four times as many highs as lows.


I have also begun keeping track of HLA records — the warmest HLA for each day of the year, and the coolest HLA for each day of the year. However, without any historical resources, this list can only take into account my own records (beginning in 2010).



Highs


Warmest temperature recorded in each month.

• Averages are up to date through Feb. 2017.



ranked vertically, using each month’s average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECAVE.
2010757586889710110310810093908791.92
20118286919610110610711110991887895.50
2012848988959710710410610395908695.33
2013858287889610710510310293888493.33
201481828794949710210310197797490.92
2015838287929098103106101100868192.42
2016838492929410010310810093888393.33
20178291
Ave.81.8883.8888.2992.1495.57102.3103.9106.4102.394.5787.0081.8693.25


ranked horizontally, using overall average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECAVE.
2010757586889710110310810093908791.92
20118286919610110610711110991887895.50
2012848988959710710410610395908695.33
2013858287889610710510310293888493.33
201481828794949710210310197797490.92
2015838287929098103106101100868192.42
2016838492929410010310810093888393.33
20178291
Ave.81.8883.8888.2992.1495.57102.3103.9106.4102.394.5787.0081.8693.25



Lows


Coolest temperature recorded in each month.

• Averages are up to date through Feb. 2017.



ranked vertically, using each month’s average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECAVE.
201015293543506773665245302444.08
201121143039456775775535272342.33
201231273950616670696240362347.83
201326333337426664716045312144.08
201415211735426466685753263141.25
201521272649596771726753313247.92
201627313944506676725851371847.42
20171638
Ave.21.5027.5031.2942.4349.8666.1470.7170.7158.7146.0031.1424.5744.99


ranked horizontally, using overall average

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECAVE.
201015293543506773665245302444.08
201121143039456775775535272342.33
201231273950616670696240362347.83
201326333337426664716045312144.08
201415211735426466685753263141.25
201521272649596771726753313247.92
201627313944506676725851371847.42
20171638
Ave.21.5027.5031.2942.4349.8666.1470.7170.7158.7146.0031.1424.57



10-Year Averages


One goal of mine with this weather section, upon the completion of 2019, is to create ten-year averages for every bit of information I have recorded — especially at the monthly and yearly levels. After doing so, I would then compare each new bit of information to the “10-year average”, which I can use as a baseline for future comparisons.

Currently, I can only compare each month’s average HLA against the average of all HLAs for that month, and that average has to be updated every year. There is currently no “baseline” number against which I can compare the new information.



See my Weather Methodology page for more information.





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