April is close to Killeen's year-round average, with average highs near 26.8°C and lows around 13.1°C (mean 20°C). It is about average for rainfall, averaging 65 mm of rainfall and 68% relative humidity across the period.
April is close to Killeen's year-round average. Across 45 years of records, the warmest April in Killeen was 2011 — when the month averaged 24°C — while the coldest was 1997 at 16.4°C. Typical April days reach 26.8°C with nights near 13.1°C. The long-term trend is warming, about 0.3°C per decade.
April is about average for rainfall in Killeen, averaging 65 mm of rainfall. The wettest April on record was 2016 with 172 mm, while the driest was 1983 at 6 mm.
Relative humidity in Killeen during April averages 68%. The most humid April was 1992 at 80%, and the least humid was 1984 at 46%.
April receives about 5.5 kWh/m²/day of solar energy in Killeen. The sunniest April was 1998 at 6.8 kWh/m²/day, and the cloudiest was 2004 at 4.6.
Average wind speed in Killeen during April is 3.3 m/s. The windiest April was 2011 at 4.3 m/s, while the calmest were 1987 and 1992 at 2.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.8°C | 19.1°C | 20.0°C | 20.3°C | 21.0°C | +1.2°C |
| Avg High | 27.1°C | 26.0°C | 26.6°C | 27.0°C | 27.8°C | +0.7°C |
| Avg Low | 12.5°C | 12.2°C | 13.5°C | 13.5°C | 14.1°C | +1.6°C |
| Avg Rain | 43 mm | 79 mm | 65 mm | 65 mm | 73 mm | +31 mm |
April temperatures in Killeen have risen by about 1.5°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -0.8°C (1987) to a record high of 38.7°C (2006).
Rainfall in April is about average for rainfall, averaging 65 mm, with a wettest year of 172 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
One of the best times to visit Killeen
April is one of the best times to visit Killeen. Expect days averaging 26.8°C and nights around 13.1°C (mean 20°C) — close to Killeen's yearly average — with moderate rainfall (65 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 29.8°C | 22.9°C | 16.0°C | 35.5°C | 3.4°C | 62 mm | 64% | 3.5 m/s | 5.3 |
| 2024 | 27.9°C | 21.7°C | 15.5°C | 32.7°C | 8.1°C | 101 mm | 71% | 3.4 m/s | 4.9 |
| 2023 | 26.3°C | 19.7°C | 13.2°C | 35.7°C | 9.8°C | 91 mm | 68% | 3.2 m/s | 5 |
| 2022 | 30.2°C | 22.6°C | 15.0°C | 35.4°C | 6.3°C | 30 mm | 59% | 4 m/s | 5.6 |
| 2021 | 27.0°C | 19.8°C | 12.7°C | 34.7°C | 4.7°C | 58 mm | 64% | 3.3 m/s | 4.8 |
| 2020 | 25.8°C | 19.1°C | 12.4°C | 34.6°C | 3.6°C | 96 mm | 72% | 3 m/s | 5.3 |
| 2019 | 25.3°C | 19.1°C | 12.9°C | 30.9°C | 2.9°C | 126 mm | 74% | 3.4 m/s | 5.5 |
| 2018 | 26.2°C | 18.5°C | 10.7°C | 32.1°C | 3.5°C | 21 mm | 62% | 3.4 m/s | 5.9 |
| 2017 | 26.9°C | 20.5°C | 14.1°C | 33.1°C | 8.2°C | 94 mm | 72% | 3.3 m/s | 5.5 |
| 2016 🌧️ | 25.9°C | 19.9°C | 13.8°C | 31.5°C | 5.3°C | 172 mm | 73% | 2.8 m/s | 5.1 |
| 2015 | 26.6°C | 21.0°C | 15.4°C | 31.4°C | 8.2°C | 74 mm | 75% | 2.8 m/s | 4.9 |
| 2014 | 26.7°C | 19.7°C | 12.6°C | 35.9°C | 1.6°C | 28 mm | 62% | 3.4 m/s | 5.7 |
| 2013 | 26.3°C | 19.0°C | 11.7°C | 33.3°C | 3.4°C | 54 mm | 68% | 3.4 m/s | 5.2 |
| 2012 | 29.1°C | 22.0°C | 14.9°C | 36.1°C | 9.2°C | 10 mm | 68% | 3.3 m/s | 6 |
| 2011 🔥 | 32.1°C | 24.0°C | 16.0°C | 37.3°C | 6.3°C | 13 mm | 53% | 4.3 m/s | 6.3 |
| 2010 | 25.1°C | 18.8°C | 12.6°C | 29.7°C | 5.7°C | 52 mm | 74% | 3.3 m/s | 5.4 |
| 2009 | 25.8°C | 19.2°C | 12.6°C | 34.3°C | 0.8°C | 118 mm | 63% | 3.8 m/s | 5.5 |
| 2008 | 26.9°C | 19.6°C | 12.4°C | 32.7°C | 3.7°C | 74 mm | 66% | 3.5 m/s | 5.8 |
| 2007 | 22.9°C | 17.0°C | 11.1°C | 28.2°C | -0.3°C | 55 mm | 76% | 2.9 m/s | 5 |
| 2006 | 29.5°C | 22.6°C | 15.6°C | 38.7°C | 9.0°C | 79 mm | 66% | 3.3 m/s | 6 |
| 2005 | 25.4°C | 18.7°C | 12.0°C | 32.4°C | 4.5°C | 20 mm | 67% | 3.4 m/s | 6.1 |
| 2004 | 25.1°C | 19.2°C | 13.4°C | 30.9°C | 5.4°C | 148 mm | 75% | 3.3 m/s | 4.6 |
| 2003 | 27.4°C | 20.4°C | 13.4°C | 33.0°C | 2.2°C | 11 mm | 67% | 3.4 m/s | 6 |
| 2002 | 28.9°C | 22.6°C | 16.3°C | 38.0°C | 6.9°C | 34 mm | 71% | 3.5 m/s | 4.8 |
| 2001 | 25.8°C | 20.4°C | 15.0°C | 30.6°C | 7.8°C | 28 mm | 77% | 3.5 m/s | 4.8 |
| 2000 | 27.8°C | 20.4°C | 13.1°C | 36.1°C | 3.8°C | 83 mm | 64% | 3.3 m/s | 5.4 |
| 1999 | 28.6°C | 21.6°C | 14.6°C | 35.7°C | 4.6°C | 44 mm | 65% | 3.5 m/s | 5.5 |
| 1998 | 25.8°C | 18.3°C | 10.7°C | 31.0°C | 6.2°C | 32 mm | 65% | 3.2 m/s | 6.8 |
| 1997 ❄️ | 22.7°C | 16.4°C | 10.2°C | 31.9°C | 0.9°C | 140 mm | 76% | 3.3 m/s | 5.1 |
| 1996 | 28.8°C | 19.9°C | 11.0°C | 38.6°C | 1.9°C | 68 mm | 54% | 3.9 m/s | 6.3 |
| 1995 | 25.9°C | 18.8°C | 11.7°C | 32.7°C | 5.4°C | 102 mm | 72% | 3.4 m/s | 5.5 |
| 1994 | 27.4°C | 20.3°C | 13.2°C | 35.3°C | 2.3°C | 56 mm | 68% | 3.4 m/s | 5.6 |
| 1993 | 23.9°C | 17.2°C | 10.6°C | 29.0°C | 3.4°C | 104 mm | 74% | 3.5 m/s | 5.3 |
| 1992 | 24.3°C | 18.4°C | 12.5°C | 28.5°C | 2.3°C | 44 mm | 80% | 2.7 m/s | 5.5 |
| 1991 | 26.8°C | 20.6°C | 14.3°C | 31.9°C | 5.1°C | 83 mm | 75% | 2.9 m/s | 4.9 |
| 1990 | 26.0°C | 19.6°C | 13.2°C | 33.6°C | 3.3°C | 113 mm | 73% | 3.5 m/s | 4.8 |
| 1989 | 27.0°C | 19.7°C | 12.5°C | 33.2°C | 2.3°C | 30 mm | 68% | 3.1 m/s | 5.7 |
| 1988 | 28.3°C | 19.8°C | 11.4°C | 35.4°C | 3.9°C | 30 mm | 56% | 3.1 m/s | 5.9 |
| 1987 | 25.7°C | 17.9°C | 10.1°C | 32.4°C | -0.8°C | 25 mm | 63% | 2.7 m/s | 6.5 |
| 1986 | 28.2°C | 21.4°C | 14.6°C | 35.0°C | 8.7°C | 60 mm | 67% | 3.4 m/s | 4.9 |
| 1985 | 26.0°C | 19.8°C | 13.6°C | 31.2°C | 5.4°C | 69 mm | 74% | 3.1 m/s | 5.4 |
| 1984 | 29.6°C | 21.0°C | 12.4°C | 38.1°C | 3.9°C | 12 mm | 46% | 3.7 m/s | 6 |
| 1983 | 25.4°C | 17.8°C | 10.2°C | 34.6°C | 2.4°C | 6 mm | 62% | 4 m/s | — |
| 1982 | 25.7°C | 18.8°C | 11.9°C | 35.7°C | 4.4°C | 92 mm | 68% | 3.3 m/s | — |
| 1981 | 27.7°C | 21.7°C | 15.8°C | 34.1°C | 7.2°C | 61 mm | 71% | 3.1 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 26.8°C with lows near 13.1°C (mean 20°C), based on 45 years of NASA POWER data.
April averages 65 mm of rainfall in Killeen, about average for rainfall. The wettest on record was 172 mm in 2016.
The hottest April reached 38.7°C in 2006. The coldest dipped to -0.8°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.5°C. Daytime highs moved from 26.9°C to 28.2°C and overnight lows from 12.8°C to 14.5°C over the same span.
April is close to Killeen's year-round average and about average for rainfall, so plan for around 26.8°C daytime highs and 13.1°C at night.
Not quite — April is the 6th coolest month in Killeen, averaging 20°C.
For April in Killeen, pack light layers you can adjust through the day, with typical highs of 26.8°C and lows of 13.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 68% — moderately humid.
Average wind speed in April is 3.3 m/s. The windiest April on record averaged 4.3 m/s (2011).
The wettest April on record was 2016 with 172 mm. On average, April sees 65 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Killeen behaves each April, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for April specifically, along with year-by-year records and how the month has changed over the decades.
