Weather and climate in Killeen, TX
What the weather is like in Killeen
The warmest month in Killeen is August, with average highs of 97°F. The coolest is January, when nights average 36°F. About 32.7 in of rain and snow falls in a typical year, most in May and least in December.
Skies are clearest in August (38% average cloud cover) and cloudiest in February (57%). Combining cloud with the length of truly dark nights, October, November, January offer the most clear, dark hours for stargazing.
Clear, dark hours per night
Hours of full astronomical darkness in mid-month, multiplied by the average share of clear sky. A rough guide to how much good observing time a typical night offers.
Monthly averages
| Month | High | Low | Precipitation | Cloud cover | Humidity | Wind | Dark hours |
|---|---|---|---|---|---|---|---|
| January | 59°F | 36°F | 2.2 in | 51% | 71% | 7 mph | 10.8 h |
| February | 63°F | 40°F | 1.9 in | 57% | 72% | 7 mph | 10.2 h |
| March | 72°F | 48°F | 3.0 in | 56% | 72% | 7 mph | 9.3 h |
| April | 80°F | 56°F | 2.6 in | 54% | 69% | 7 mph | 8.2 h |
| May | 86°F | 64°F | 4.3 in | 57% | 71% | 7 mph | 7.2 h |
| June | 93°F | 72°F | 3.3 in | 42% | 66% | 6 mph | 6.6 h |
| July | 96°F | 74°F | 2.2 in | 40% | 62% | 6 mph | 6.9 h |
| August | 97°F | 75°F | 2.4 in | 38% | 59% | 6 mph | 7.8 h |
| September | 90°F | 68°F | 3.2 in | 41% | 66% | 5 mph | 8.9 h |
| October | 81°F | 57°F | 3.8 in | 40% | 67% | 6 mph | 9.9 h |
| November | 70°F | 47°F | 2.1 in | 46% | 70% | 6 mph | 10.6 h |
| December | 61°F | 38°F | 1.8 in | 52% | 71% | 6 mph | 11.0 h |
Climate averages: NASA POWER, 2001–2025, for the grid area around 31.00, -97.50 (about 50 km across). High and low temperatures are estimated from the monthly mean and the average daily range. Hills, coasts and cities can differ from the area average. Sources and methods.