Killeen climate
Killeen (Texas, United States) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 20 °C67 °F, and about 831 mm33 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Killeen climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 1559 | 236 | 847 | 562.2 | 8 |
| Feb | 1763 | 439 | 1151 | 481.9 | 5 |
| Mar | 2271 | 947 | 1559 | 753.0 | 2 |
| Apr | 2679 | 1355 | 2067 | 652.6 | 0 |
| May | 3085 | 1864 | 2475 | 1094.3 | 0 |
| Jun | 3493 | 2271 | 2882 | 833.3 | 0 |
| Jul | 3595 | 2374 | 2985 | 562.2 | 0 |
| Aug | 3697 | 2474 | 3086 | 612.4 | 0 |
| Sep | 3289 | 2068 | 2679 | 813.2 | 0 |
| Oct | 2780 | 1457 | 2068 | 963.8 | 0 |
| Nov | 2169 | 847 | 1458 | 542.1 | 1 |
| Dec | 1660 | 338 | 949 | 461.8 | 6 |
| Year | 3697 | 236 | 2067 | 83133 | 22 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 71% | 51% | 3.0 | 10:20 |
| Feb | 72% | 57% | 3.5 | 11:03 |
| Mar | 72% | 56% | 4.5 | 11:54 |
| Apr | 69% | 54% | 5.5 | 12:54 |
| May | 71% | 57% | 5.9 | 13:43 |
| Jun | 66% | 42% | 6.8 | 14:09 |
| Jul | 62% | 40% | 6.8 | 13:59 |
| Aug | 59% | 38% | 6.3 | 13:16 |
| Sep | 66% | 41% | 5.2 | 12:19 |
| Oct | 67% | 40% | 4.2 | 11:21 |
| Nov | 70% | 46% | 3.2 | 10:32 |
| Dec | 71% | 52% | 2.7 | 10:08 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Killeen is like
The warmest month is August, with an average high of 36 °C97 °F and a low of 24 °C74 °F. The coldest is January, when highs average 15 °C59 °F and lows 2 °C36 °F. Seasons are strongly marked: the warmest month is on average 21.3 °C38.3 °F warmer than the coldest.
Annual precipitation is moderate at about 831 mm33 in. The wettest three-month stretch is April–June, which brings 31% of the annual total. The wettest month is May (109 mm4.3 in), the driest is December (46 mm1.8 in).
Relative humidity ranges from 59% in August to 72% in February. The clearest skies (lowest average cloud amount, 38%) are typical of August. Average wind speed near the ground ranges from 8 km/h (5 mph) in September to 12 km/h (7 mph) in April. Daylight lasts from about 10.1 hours in December to 14.2 hours in June.
Best time to visit Killeen
Based on these averages, the most comfortable months for sightseeing and outdoor activities are March and April and October and November: average highs of 21 °C69 °F to 27 °C80 °F with 54 mm2.1 in to 96 mm3.8 in of precipitation per month.
The most challenging month is August, which is hot, with average highs of 36 °C97 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Killeen
- Winter (December–February) — highs 1559 to 17 °C63 °F, lows 236 to 4 °C39 °F, about 50 mm2.0 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Spring (March–May) — highs 2271 to 30 °C85 °F, lows 947 to 18 °C64 °F, about 83 mm3.3 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 3493 to 36 °C97 °F, lows 2271 to 24 °C74 °F, about 67 mm2.6 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
- Autumn (September–November) — highs 2169 to 32 °C89 °F, lows 847 to 20 °C68 °F, about 77 mm3.0 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
How Killeen compares
Compared with Austin, about 95 km to the south, Killeen is on average 0.9 °C1.6 °F cooler and receives a similar amount of precipitation. The difference is largest in February (1.1 °C2.1 °F cooler).
Of the 222 places in the United States covered by World Climates, Killeen is the 43rd warmest by annual mean temperature and the 141st wettest by annual precipitation. See all of them on the United States climate page.
Places in other countries with the most similar temperature and rainfall pattern: Hongjiang (China, Cfa), Baisha (China, Cfa) and Mingora (Pakistan, Cfa).
Nearby places
- Waco 73 km · 20 °C67 °F · 946 mm37 in
- Austin 95 km · 20 °C69 °F · 840 mm33 in
- College Station 144 km · 20 °C68 °F · 1,069 mm42 in
- Fort Worth 183 km · 19 °C66 °F · 869 mm34 in
- Arlington 189 km · 19 °C66 °F · 935 mm37 in
- Grand Prairie 194 km · 19 °C66 °F · 935 mm37 in
- San Antonio 202 km · 21 °C70 °F · 780 mm31 in
- Dallas 205 km · 19 °C66 °F · 922 mm36 in
Frequently asked questions
What is the warmest month in Killeen?
August is the warmest month in Killeen, with an average high of 36 °C (97 °F) and an average low of 24 °C (74 °F).
What is the coldest month in Killeen?
January is the coldest month, with an average high of 15 °C (59 °F) and an average low of 2 °C (36 °F).
When does it rain the most in Killeen?
May is the wettest month with about 109 mm (4.3 in) of precipitation; December is the driest with about 46 mm (1.8 in).
What is the best time to visit Killeen?
Judging by long-term averages, the most comfortable months are March and April and October and November.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.