April is one of the cooler months of the year in Fort Smith, with average highs near 21.1°C and lows around 8.8°C (mean 15°C). It is a relatively wet time of year, averaging 123 mm of rainfall and 78% relative humidity across the period.
April is one of the cooler months of the year in Fort Smith. Across 45 years of records, the warmest April in Fort Smith was 1981 — when the month averaged 19.2°C — while the coldest was 2018 at 11.6°C. Typical April days reach 21.1°C with nights near 8.8°C. The long-term trend is warming, about 0.2°C per decade.
April is a relatively wet time of year in Fort Smith, averaging 123 mm of rainfall. The wettest April on record was 2011 with 277 mm, while the driest was 1989 at 23 mm.
Relative humidity in Fort Smith during April averages 78%. The most humid April was 2002 at 83%, and the least humid was 1981 at 69%.
April receives about 5.2 kWh/m²/day of solar energy in Fort Smith. The sunniest April was 1987 at 6.2 kWh/m²/day, and the cloudiest was 1993 at 4.4.
Average wind speed in Fort Smith during April is 2.1 m/s. The windiest April was 1983 at 2.5 m/s, while the calmest was 1989 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.6°C | 14.2°C | 15.4°C | 15.4°C | 15.2°C | +0.6°C |
| Avg High | 20.9°C | 20.3°C | 21.7°C | 21.6°C | 21.1°C | +0.2°C |
| Avg Low | 8.3°C | 8.1°C | 9.2°C | 9.3°C | 9.2°C | +0.9°C |
| Avg Rain | 87 mm | 137 mm | 111 mm | 132 mm | 159 mm | +72 mm |
April temperatures in Fort Smith have risen by about 0.9°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -4.7°C (2007) to a record high of 34.4°C (2006).
Rainfall in April is a relatively wet time of year, averaging 123 mm, with a wettest year of 277 mm.
A good time to visit Fort Smith
April is a good time to visit Fort Smith, with days averaging 21.1°C and nights around 8.8°C (mean 15°C, close to Fort Smith's yearly average) and higher rainfall. September and June are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 22.5°C | 16.8°C | 11.0°C | 26.6°C | 0.4°C | 249 mm | 82% | 2.1 m/s | 4.8 |
| 2024 | 22.7°C | 16.7°C | 10.7°C | 27.6°C | 2.0°C | 140 mm | 77% | 2.3 m/s | 5.2 |
| 2023 | 20.7°C | 14.5°C | 8.3°C | 27.1°C | 2.4°C | 65 mm | 77% | 1.9 m/s | 5.4 |
| 2022 | 21.1°C | 15.1°C | 9.0°C | 26.4°C | -1.4°C | 166 mm | 78% | 2.3 m/s | 5.1 |
| 2021 | 20.3°C | 14.0°C | 7.7°C | 26.2°C | -0.1°C | 186 mm | 78% | 2 m/s | 5.1 |
| 2020 | 19.4°C | 13.8°C | 8.3°C | 27.9°C | -0.2°C | 149 mm | 81% | 1.9 m/s | 4.9 |
| 2019 | 21.4°C | 15.4°C | 9.4°C | 27.9°C | 0.4°C | 178 mm | 81% | 2 m/s | 5.3 |
| 2018 ❄️ | 18.2°C | 11.6°C | 5.0°C | 24.7°C | -3.7°C | 92 mm | 78% | 2.2 m/s | 5.2 |
| 2017 | 23.0°C | 17.0°C | 10.9°C | 27.5°C | 2.7°C | 204 mm | 79% | 2.2 m/s | 4.8 |
| 2016 | 22.1°C | 16.2°C | 10.3°C | 27.1°C | 0.2°C | 122 mm | 79% | 2.1 m/s | 5.3 |
| 2015 | 21.5°C | 15.9°C | 10.3°C | 26.4°C | 1.2°C | 101 mm | 81% | 2 m/s | 4.6 |
| 2014 | 20.8°C | 14.4°C | 7.9°C | 26.8°C | -2.0°C | 81 mm | 76% | 2.1 m/s | 5.3 |
| 2013 | 19.9°C | 13.6°C | 7.3°C | 27.3°C | 0.4°C | 119 mm | 79% | 2.1 m/s | 5 |
| 2012 | 22.9°C | 17.3°C | 11.6°C | 28.1°C | 3.2°C | 79 mm | 81% | 1.9 m/s | 5.5 |
| 2011 🌧️ | 23.7°C | 16.7°C | 9.7°C | 31.3°C | 1.9°C | 277 mm | 73% | 2.4 m/s | 4.8 |
| 2010 | 22.0°C | 16.2°C | 10.3°C | 27.1°C | 3.5°C | 63 mm | 78% | 2.1 m/s | 5.2 |
| 2009 | 20.1°C | 14.1°C | 8.1°C | 30.4°C | -3.7°C | 118 mm | 78% | 2.3 m/s | 4.8 |
| 2008 | 19.7°C | 13.4°C | 7.2°C | 27.5°C | -2.0°C | 185 mm | 82% | 2.3 m/s | 5.3 |
| 2007 | 19.0°C | 13.0°C | 7.0°C | 26.9°C | -4.7°C | 84 mm | 76% | 2 m/s | 5.2 |
| 2006 | 25.4°C | 18.5°C | 11.5°C | 34.4°C | 2.5°C | 120 mm | 71% | 2.1 m/s | 5.6 |
| 2005 | 20.8°C | 14.7°C | 8.7°C | 26.4°C | 0.8°C | 76 mm | 78% | 2 m/s | 5.6 |
| 2004 | 21.8°C | 15.7°C | 9.6°C | 26.9°C | 1.4°C | 193 mm | 78% | 1.9 m/s | 5.4 |
| 2003 | 22.7°C | 15.9°C | 9.1°C | 28.3°C | -2.3°C | 54 mm | 72% | 2.3 m/s | 5.6 |
| 2002 | 22.3°C | 16.4°C | 10.6°C | 28.1°C | 0.9°C | 149 mm | 83% | 2 m/s | 4.9 |
| 2001 | 23.4°C | 17.7°C | 12.0°C | 27.5°C | 1.3°C | 47 mm | 78% | 2.1 m/s | 5.1 |
| 2000 | 21.8°C | 14.8°C | 7.7°C | 28.8°C | 0.8°C | 81 mm | 69% | 2.1 m/s | 5.3 |
| 1999 | 21.7°C | 15.8°C | 9.8°C | 27.9°C | 0.8°C | 143 mm | 81% | 2.2 m/s | 4.8 |
| 1998 | 19.6°C | 13.6°C | 7.6°C | 25.8°C | 3.3°C | 57 mm | 78% | 2.1 m/s | 5.7 |
| 1997 | 18.2°C | 12.2°C | 6.1°C | 25.4°C | -3.5°C | 105 mm | 79% | 2.1 m/s | 5.2 |
| 1996 | 20.5°C | 13.2°C | 5.9°C | 27.8°C | -1.7°C | 137 mm | 70% | 2.3 m/s | 5.8 |
| 1995 | 20.7°C | 14.3°C | 7.9°C | 25.9°C | 1.5°C | 158 mm | 79% | 2.1 m/s | 5.1 |
| 1994 | 21.7°C | 15.4°C | 9.1°C | 27.9°C | -1.7°C | 115 mm | 79% | 2.1 m/s | 5.3 |
| 1993 | 18.1°C | 12.5°C | 6.9°C | 24.8°C | -0.8°C | 171 mm | 82% | 2.1 m/s | 4.4 |
| 1992 | 21.0°C | 15.0°C | 8.9°C | 27.1°C | -1.8°C | 91 mm | 80% | 1.8 m/s | 5.4 |
| 1991 | 22.3°C | 16.4°C | 10.6°C | 26.6°C | 3.8°C | 155 mm | 81% | 1.9 m/s | 5.1 |
| 1990 | 19.3°C | 13.6°C | 7.8°C | 25.9°C | -2.2°C | 234 mm | 81% | 1.9 m/s | 5 |
| 1989 | 20.9°C | 14.7°C | 8.4°C | 27.5°C | -3.7°C | 23 mm | 77% | 1.7 m/s | 5.7 |
| 1988 | 20.6°C | 14.0°C | 7.5°C | 26.6°C | 1.2°C | 84 mm | 77% | 2 m/s | 5.6 |
| 1987 | 21.5°C | 14.5°C | 7.5°C | 29.6°C | -4.2°C | 39 mm | 73% | 1.8 m/s | 6.2 |
| 1986 | 21.2°C | 15.5°C | 9.8°C | 26.3°C | 1.0°C | 190 mm | 81% | 2 m/s | 5.2 |
| 1985 | 21.4°C | 15.6°C | 9.7°C | 26.3°C | -0.4°C | 133 mm | 82% | 1.9 m/s | 5.4 |
| 1984 | 19.0°C | 13.1°C | 7.2°C | 25.3°C | 0.9°C | 78 mm | 78% | 2.4 m/s | 5 |
| 1983 | 17.8°C | 11.8°C | 5.7°C | 27.2°C | -2.8°C | 104 mm | 81% | 2.5 m/s | — |
| 1982 | 19.6°C | 13.0°C | 6.5°C | 27.3°C | -2.7°C | 50 mm | 74% | 2.1 m/s | — |
| 1981 🔥 | 25.9°C | 19.2°C | 12.4°C | 31.1°C | 3.7°C | 81 mm | 69% | 2 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 21.1°C with lows near 8.8°C (mean 15°C), based on 45 years of NASA POWER data.
April averages 123 mm of rainfall in Fort Smith, a relatively wet time of year. The wettest on record was 277 mm in 2011.
The hottest April reached 34.4°C in 2006. The coldest dipped to -4.7°C in 2007.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.9°C. Daytime highs moved from 20.7°C to 21.5°C and overnight lows from 8.3°C to 9.3°C over the same span.
April is one of the cooler months of the year in Fort Smith and a relatively wet time of year, so plan for around 21.1°C daytime highs and 8.8°C at night.
Not quite — April is the 6th coolest month in Fort Smith, averaging 15°C.
For April in Fort Smith, pack light layers you can adjust through the day, with typical highs of 21.1°C and lows of 8.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 78% — quite humid.
Average wind speed in April is 2.1 m/s. The windiest April on record averaged 2.5 m/s (1983).
The wettest April on record was 2011 with 277 mm. On average, April sees 123 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 Fort Smith 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.
