April is one of the cooler months of the year in Tempe, with average highs near 28.9°C and lows around 11.9°C (mean 20.4°C). It is one of the drier months, averaging 9 mm of rainfall and 31% relative humidity across the period.
April is one of the cooler months of the year in Tempe. Across 45 years of records, the warmest April in Tempe was 1989 — when the month averaged 23.9°C — while the coldest was 1983 at 15.7°C. Typical April days reach 28.9°C with nights near 11.9°C. The long-term trend is warming, about 0.5°C per decade.
April is one of the drier months in Tempe, averaging 9 mm of rainfall. The wettest April on record was 1988 with 53 mm, while the driest were 2018, 2022 and 2023, among others at 0 mm.
Relative humidity in Tempe during April averages 31%. The most humid April was 1983 at 48%, and the least humid was 2018 at 16%.
April receives about 7.2 kWh/m²/day of solar energy in Tempe. The sunniest April was 2008 at 7.8 kWh/m²/day, and the cloudiest was 1984 at 6.3.
Average wind speed in Tempe during April is 2.2 m/s. The windiest Aprils were 1984 and 1999 at 2.6 m/s, while the calmest was 1992 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.3°C | 19.2°C | 20.2°C | 21.3°C | 21.5°C | +1.2°C |
| Avg High | 29.0°C | 27.7°C | 28.6°C | 29.7°C | 30.0°C | +1°C |
| Avg Low | 11.6°C | 10.8°C | 11.7°C | 13.0°C | 13.0°C | +1.4°C |
| Avg Rain | 14 mm | 12 mm | 11 mm | 5 mm | 3 mm | -11 mm |
April temperatures in Tempe have risen by about 2.2°C between 1981–1985 and 2021–2025.
April has ranged from a record low of 1.3°C (1999) to a record high of 39.9°C (2012).
Rainfall in April is one of the drier months, averaging 9 mm, with a wettest year of 53 mm.
One of the best times to visit Tempe
April is one of the best times to visit Tempe. Expect days averaging 28.9°C and nights around 11.9°C (mean 20.4°C) — cooler than Tempe's yearly average — with low rainfall (9 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 | 29.4°C | 21.2°C | 12.9°C | 37.6°C | 6.4°C | 5 mm | 24% | 2 m/s | 7.2 |
| 2024 | 28.5°C | 20.3°C | 12.1°C | 35.7°C | 5.0°C | 7 mm | 34% | 2 m/s | 7.4 |
| 2023 | 29.6°C | 20.7°C | 11.8°C | 37.9°C | 2.3°C | 0 mm | 30% | 2.1 m/s | 7.5 |
| 2022 | 31.6°C | 22.6°C | 13.6°C | 35.7°C | 5.8°C | 0 mm | 19% | 2.3 m/s | 7.7 |
| 2021 | 31.8°C | 23.2°C | 14.6°C | 36.6°C | 10.8°C | 2 mm | 19% | 2.4 m/s | 7.3 |
| 2020 | 29.0°C | 20.9°C | 12.7°C | 38.8°C | 7.4°C | 3 mm | 38% | 2 m/s | 7.4 |
| 2019 | 29.5°C | 21.5°C | 13.6°C | 36.8°C | 8.8°C | 4 mm | 35% | 2.1 m/s | 7.1 |
| 2018 | 32.2°C | 23.8°C | 15.4°C | 37.1°C | 8.2°C | 0 mm | 16% | 2.3 m/s | 7.3 |
| 2017 | 30.4°C | 21.9°C | 13.4°C | 36.0°C | 6.8°C | 0 mm | 26% | 2.1 m/s | 7.3 |
| 2016 | 29.2°C | 21.3°C | 13.4°C | 36.4°C | 8.8°C | 14 mm | 28% | 2.2 m/s | 7.1 |
| 2015 | 29.3°C | 21.1°C | 12.8°C | 36.3°C | 7.2°C | 10 mm | 26% | 2.1 m/s | 7.3 |
| 2014 | 29.9°C | 21.5°C | 13.0°C | 35.7°C | 6.5°C | 2 mm | 22% | 2.2 m/s | 7.3 |
| 2013 | 29.9°C | 21.1°C | 12.4°C | 38.0°C | 5.4°C | 4 mm | 27% | 2.2 m/s | 7.5 |
| 2012 | 30.3°C | 21.9°C | 13.6°C | 39.9°C | 6.9°C | 6 mm | 22% | 2 m/s | 7.2 |
| 2011 | 29.5°C | 20.8°C | 12.2°C | 36.4°C | 2.3°C | 12 mm | 27% | 2.5 m/s | 7.3 |
| 2010 | 26.4°C | 18.4°C | 10.4°C | 33.5°C | 5.3°C | 1 mm | 36% | 2.2 m/s | 7.2 |
| 2009 | 27.8°C | 19.3°C | 10.8°C | 37.1°C | 4.4°C | 11 mm | 28% | 2.4 m/s | 7.3 |
| 2008 | 29.1°C | 19.8°C | 10.5°C | 35.5°C | 6.1°C | 1 mm | 25% | 2.4 m/s | 7.8 |
| 2007 | 28.9°C | 20.5°C | 12.0°C | 38.3°C | 6.8°C | 8 mm | 30% | 2.1 m/s | 7.2 |
| 2006 | 28.2°C | 19.9°C | 11.6°C | 34.7°C | 6.3°C | 2 mm | 29% | 2 m/s | 7.1 |
| 2005 | 27.8°C | 19.2°C | 10.7°C | 33.7°C | 6.3°C | 11 mm | 39% | 2.2 m/s | 7.4 |
| 2004 | 28.1°C | 20.2°C | 12.3°C | 36.0°C | 8.2°C | 35 mm | 36% | 2.3 m/s | 7.1 |
| 2003 | 26.6°C | 18.4°C | 10.1°C | 32.4°C | 4.5°C | 5 mm | 33% | 2.4 m/s | 7.4 |
| 2002 | 31.3°C | 22.9°C | 14.5°C | 37.2°C | 8.7°C | 4 mm | 21% | 2.2 m/s | 7.2 |
| 2001 | 27.5°C | 19.4°C | 11.3°C | 36.5°C | 3.6°C | 32 mm | 38% | 2.2 m/s | 6.8 |
| 2000 | 31.1°C | 22.0°C | 12.9°C | 38.9°C | 5.6°C | 2 mm | 27% | 2.2 m/s | 7.6 |
| 1999 | 24.9°C | 16.8°C | 8.7°C | 34.8°C | 1.3°C | 36 mm | 36% | 2.6 m/s | 6.9 |
| 1998 | 24.5°C | 16.4°C | 8.2°C | 34.7°C | 3.0°C | 12 mm | 45% | 2.3 m/s | 7.2 |
| 1997 | 27.6°C | 19.4°C | 11.2°C | 34.9°C | 6.0°C | 15 mm | 32% | 2.4 m/s | 6.8 |
| 1996 | 30.8°C | 21.6°C | 12.3°C | 38.6°C | 8.4°C | 0 mm | 18% | 2.4 m/s | 7.5 |
| 1995 | 26.3°C | 17.8°C | 9.4°C | 32.4°C | 4.0°C | 13 mm | 40% | 2.2 m/s | 6.7 |
| 1994 | 28.4°C | 20.0°C | 11.6°C | 36.8°C | 6.3°C | 14 mm | 33% | 2.2 m/s | 6.8 |
| 1993 | 28.1°C | 19.5°C | 10.8°C | 34.0°C | 5.1°C | 0 mm | 44% | 2 m/s | 7.3 |
| 1992 | 29.7°C | 21.2°C | 12.7°C | 37.8°C | 8.0°C | 11 mm | 43% | 1.8 m/s | 7.2 |
| 1991 | 27.2°C | 18.3°C | 9.4°C | 32.7°C | 3.9°C | 0 mm | 36% | 2.2 m/s | 7.5 |
| 1990 | 29.1°C | 21.2°C | 13.2°C | 35.1°C | 9.4°C | 14 mm | 35% | 2.1 m/s | 6.6 |
| 1989 🔥 | 33.3°C | 23.9°C | 14.4°C | 39.8°C | 9.2°C | 0 mm | 23% | 2.2 m/s | 7.3 |
| 1988 🌧️ | 27.8°C | 19.6°C | 11.4°C | 35.6°C | 5.1°C | 53 mm | 37% | 2.2 m/s | 6.5 |
| 1987 | 30.7°C | 21.9°C | 13.0°C | 35.8°C | 6.1°C | 3 mm | 32% | 2.4 m/s | 6.9 |
| 1986 | 28.9°C | 20.2°C | 11.6°C | 35.1°C | 7.2°C | 3 mm | 32% | 2.3 m/s | 6.8 |
| 1985 | 30.2°C | 21.6°C | 13.0°C | 36.2°C | 6.3°C | 12 mm | 36% | 2.1 m/s | 6.8 |
| 1984 | 27.5°C | 18.6°C | 9.7°C | 37.4°C | 4.5°C | 24 mm | 29% | 2.6 m/s | 6.3 |
| 1983 ❄️ | 23.6°C | 15.7°C | 7.7°C | 31.0°C | 2.7°C | 15 mm | 48% | 2.2 m/s | — |
| 1982 | 28.0°C | 19.6°C | 11.2°C | 33.8°C | 5.0°C | 1 mm | 34% | 2.1 m/s | — |
| 1981 | 30.6°C | 21.6°C | 12.7°C | 36.8°C | 5.0°C | 13 mm | 33% | 2.2 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 28.9°C with lows near 11.9°C (mean 20.4°C), based on 45 years of NASA POWER data.
April averages 9 mm of rainfall in Tempe, one of the drier months. The wettest on record was 53 mm in 1988.
The hottest April reached 39.9°C in 2012. The coldest dipped to 1.3°C in 1999.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 2.2°C. Daytime highs moved from 28°C to 30.2°C and overnight lows from 10.9°C to 13°C over the same span.
April is one of the cooler months of the year in Tempe and one of the drier months, so plan for around 28.9°C daytime highs and 11.9°C at night.
Not quite — April is the 6th coolest month in Tempe, averaging 20.4°C.
For April in Tempe, pack light layers you can adjust through the day, with typical highs of 28.9°C and lows of 11.9°C.
Relative humidity in April averages 31% — relatively dry.
Average wind speed in April is 2.2 m/s. The windiest April on record averaged 2.6 m/s (1984).
The wettest April on record was 1988 with 53 mm. On average, April sees 9 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 Tempe 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.
