April is close to Keller's year-round average, with average highs near 25.2°C and lows around 11.3°C (mean 18.3°C). It is about average for rainfall, averaging 80 mm of rainfall and 67% relative humidity across the period.
April is close to Keller's year-round average. Across 45 years of records, the warmest April in Keller was 2011 — when the month averaged 22.1°C — while the coldest was 1997 at 14.8°C. Typical April days reach 25.2°C with nights near 11.3°C. The long-term trend is warming, about 0.2°C per decade.
April is about average for rainfall in Keller, averaging 80 mm of rainfall. The wettest April on record was 1990 with 238 mm, while the driest was 1987 at 11 mm.
Relative humidity in Keller during April averages 67%. The most humid April was 1990 at 79%, and the least humid was 2011 at 52%.
April receives about 5.6 kWh/m²/day of solar energy in Keller. The sunniest April was 1998 at 6.7 kWh/m²/day, and the cloudiest were 1990, 2002 and 2015 at 4.8.
Average wind speed in Keller during April is 3.6 m/s. The windiest April was 2011 at 4.4 m/s, while the calmest were 1992, 2015 and 2016 at 3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 18.2°C | 17.5°C | 18.6°C | 18.6°C | 18.6°C | +0.4°C |
| Avg High | 25.5°C | 24.5°C | 25.5°C | 25.4°C | 25.2°C | -0.3°C |
| Avg Low | 10.8°C | 10.4°C | 11.8°C | 11.7°C | 12.0°C | +1.2°C |
| Avg Rain | 54 mm | 91 mm | 75 mm | 85 mm | 99 mm | +45 mm |
April temperatures in Keller have risen by about 1.1°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -2.4°C (1987) to a record high of 38.6°C (2006).
Rainfall in April is about average for rainfall, averaging 80 mm, with a wettest year of 238 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.3°C per decade, narrowing the gap between day and night.
One of the best times to visit Keller
April is one of the best times to visit Keller. Expect days averaging 25.2°C and nights around 11.3°C (mean 18.3°C) — close to Keller's yearly average — with higher rainfall (80 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 | 26.0°C | 19.9°C | 13.8°C | 35.2°C | 1.7°C | 193 mm | 68% | 3.4 m/s | 5.1 |
| 2024 | 25.3°C | 19.4°C | 13.6°C | 31.6°C | 6.9°C | 150 mm | 72% | 3.6 m/s | 5.1 |
| 2023 | 25.0°C | 17.9°C | 10.8°C | 33.1°C | 5.5°C | 34 mm | 63% | 3.3 m/s | 5.3 |
| 2022 | 28.0°C | 20.3°C | 12.6°C | 35.5°C | 4.8°C | 76 mm | 58% | 4.3 m/s | 5.8 |
| 2021 | 23.9°C | 17.3°C | 10.7°C | 33.2°C | 1.9°C | 114 mm | 65% | 3.4 m/s | 5 |
| 2020 | 23.2°C | 16.8°C | 10.4°C | 32.3°C | 1.9°C | 29 mm | 73% | 3.2 m/s | 5.4 |
| 2019 | 24.6°C | 18.2°C | 11.7°C | 31.9°C | 2.5°C | 129 mm | 73% | 3.5 m/s | 5.6 |
| 2018 | 23.3°C | 15.6°C | 7.9°C | 31.6°C | 0.9°C | 24 mm | 64% | 3.5 m/s | 6 |
| 2017 | 26.1°C | 19.4°C | 12.7°C | 33.0°C | 6.8°C | 80 mm | 69% | 3.7 m/s | 5.5 |
| 2016 | 24.5°C | 18.4°C | 12.2°C | 29.6°C | 3.3°C | 175 mm | 73% | 3 m/s | 5.3 |
| 2015 | 24.2°C | 18.5°C | 12.9°C | 31.1°C | 6.3°C | 139 mm | 77% | 3 m/s | 4.8 |
| 2014 | 25.6°C | 18.4°C | 11.3°C | 32.2°C | 0.2°C | 52 mm | 59% | 3.7 m/s | 5.9 |
| 2013 | 23.8°C | 16.6°C | 9.4°C | 31.5°C | 1.3°C | 73 mm | 68% | 3.7 m/s | 5.5 |
| 2012 | 27.5°C | 20.6°C | 13.8°C | 35.5°C | 6.7°C | 38 mm | 70% | 3.3 m/s | 5.9 |
| 2011 🔥 | 30.3°C | 22.1°C | 14.0°C | 38.4°C | 4.2°C | 59 mm | 52% | 4.4 m/s | 6.2 |
| 2010 | 24.3°C | 17.8°C | 11.4°C | 28.6°C | 3.9°C | 85 mm | 71% | 3.7 m/s | 5.6 |
| 2009 | 25.4°C | 18.2°C | 11.1°C | 35.8°C | -1.2°C | 114 mm | 61% | 4.1 m/s | 5.5 |
| 2008 | 24.3°C | 17.1°C | 9.9°C | 32.0°C | 3.8°C | 111 mm | 69% | 3.9 m/s | 6 |
| 2007 | 22.2°C | 15.9°C | 9.7°C | 28.7°C | -0.6°C | 86 mm | 72% | 3.4 m/s | 5.1 |
| 2006 | 28.6°C | 21.1°C | 13.6°C | 38.6°C | 5.9°C | 80 mm | 61% | 3.6 m/s | 6.1 |
| 2005 | 25.7°C | 18.5°C | 11.2°C | 34.5°C | 3.9°C | 11 mm | 61% | 3.8 m/s | 6.1 |
| 2004 | 25.1°C | 18.6°C | 12.1°C | 32.5°C | 3.0°C | 121 mm | 70% | 3.4 m/s | 5 |
| 2003 | 27.5°C | 19.7°C | 12.0°C | 34.4°C | 0.1°C | 30 mm | 59% | 4 m/s | 6.1 |
| 2002 | 25.2°C | 19.5°C | 13.8°C | 35.1°C | 3.3°C | 86 mm | 77% | 3.4 m/s | 4.8 |
| 2001 | 25.2°C | 19.3°C | 13.5°C | 28.6°C | 4.3°C | 30 mm | 75% | 3.8 m/s | 5 |
| 2000 | 25.5°C | 18.2°C | 10.8°C | 32.3°C | 1.7°C | 83 mm | 65% | 3.4 m/s | 5.4 |
| 1999 | 26.4°C | 19.5°C | 12.6°C | 34.5°C | 2.0°C | 71 mm | 64% | 3.7 m/s | 5.8 |
| 1998 | 24.0°C | 16.6°C | 9.1°C | 30.6°C | 3.5°C | 30 mm | 65% | 3.4 m/s | 6.7 |
| 1997 ❄️ | 20.9°C | 14.8°C | 8.6°C | 28.8°C | -2.4°C | 138 mm | 76% | 3.6 m/s | 5.2 |
| 1996 | 26.1°C | 17.4°C | 8.8°C | 34.8°C | 1.5°C | 66 mm | 53% | 4 m/s | 6.3 |
| 1995 | 24.2°C | 17.1°C | 10.0°C | 30.6°C | 3.1°C | 103 mm | 73% | 3.7 m/s | 5.5 |
| 1994 | 26.0°C | 18.6°C | 11.2°C | 32.4°C | -0.6°C | 75 mm | 66% | 3.8 m/s | 5.8 |
| 1993 | 22.9°C | 16.1°C | 9.2°C | 30.2°C | 1.2°C | 83 mm | 73% | 3.6 m/s | 5.5 |
| 1992 | 24.3°C | 17.8°C | 11.3°C | 30.0°C | 1.5°C | 39 mm | 75% | 3 m/s | 5.4 |
| 1991 | 27.7°C | 20.1°C | 12.6°C | 35.4°C | 4.8°C | 63 mm | 65% | 3.4 m/s | 5.4 |
| 1990 🌧️ | 22.3°C | 16.6°C | 10.9°C | 27.4°C | 2.1°C | 238 mm | 79% | 3.4 m/s | 4.8 |
| 1989 | 24.9°C | 17.9°C | 10.8°C | 32.9°C | -1.3°C | 40 mm | 69% | 3.4 m/s | 6 |
| 1988 | 26.6°C | 18.3°C | 9.9°C | 33.7°C | 2.5°C | 41 mm | 56% | 3.5 m/s | 6.2 |
| 1987 | 25.8°C | 17.6°C | 9.5°C | 35.7°C | -2.4°C | 11 mm | 59% | 3.1 m/s | 6.4 |
| 1986 | 27.3°C | 20.2°C | 13.1°C | 32.9°C | 6.6°C | 115 mm | 66% | 3.7 m/s | 5.4 |
| 1985 | 25.1°C | 18.6°C | 12.1°C | 29.7°C | 3.9°C | 99 mm | 73% | 3.3 m/s | 5.9 |
| 1984 | 25.1°C | 17.3°C | 9.4°C | 35.0°C | 1.6°C | 28 mm | 57% | 3.9 m/s | 5.9 |
| 1983 | 23.9°C | 16.1°C | 8.3°C | 35.1°C | 0.3°C | 21 mm | 62% | 4.2 m/s | — |
| 1982 | 23.7°C | 16.7°C | 9.8°C | 33.9°C | 1.6°C | 57 mm | 67% | 3.6 m/s | — |
| 1981 | 27.2°C | 20.8°C | 14.4°C | 33.2°C | 5.9°C | 77 mm | 67% | 3.4 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 25.2°C with lows near 11.3°C (mean 18.3°C), based on 45 years of NASA POWER data.
April averages 80 mm of rainfall in Keller, about average for rainfall. The wettest on record was 238 mm in 1990.
The hottest April reached 38.6°C in 2006. The coldest dipped to -2.4°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.1°C. Daytime highs moved from 25°C to 25.6°C and overnight lows from 10.8°C to 12.3°C over the same span.
April is close to Keller's year-round average and about average for rainfall, so plan for around 25.2°C daytime highs and 11.3°C at night.
Not quite — April is the 6th coolest month in Keller, averaging 18.3°C.
For April in Keller, pack light layers you can adjust through the day, with typical highs of 25.2°C and lows of 11.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 67% — moderately humid.
Average wind speed in April is 3.6 m/s. The windiest April on record averaged 4.4 m/s (2011).
The wettest April on record was 1990 with 238 mm. On average, April sees 80 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 Keller 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.
