April is one of the cooler months of the year in Olympia, with average highs near 13.2°C and lows around 4.3°C (mean 8.8°C). It is one of the drier months, averaging 130 mm of rainfall and 85% relative humidity across the period.
April is one of the cooler months of the year in Olympia. Across 45 years of records, the warmest April in Olympia was 2016 — when the month averaged 11.7°C — while the coldest was 2011 at 6°C. Typical April days reach 13.2°C with nights near 4.3°C. The long-term April temperature trend is broadly flat.
April is one of the drier months in Olympia, averaging 130 mm of rainfall. The wettest April on record was 1996 with 243 mm, while the driest was 2021 at 42 mm.
Relative humidity in Olympia during April averages 85%. The most humid April was 2023 at 89%, and the least humid was 2021 at 79%.
April receives about 4.2 kWh/m²/day of solar energy in Olympia. The sunniest April was 2021 at 5.3 kWh/m²/day, and the cloudiest was 1996 at 3.4.
Average wind speed in Olympia during April is 0.2 m/s. The windiest Aprils were 2015, 2020 and 2021, among others at 0.3 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.6°C | 9.1°C | 8.6°C | 8.8°C | 8.7°C | +0.1°C |
| Avg High | 13.2°C | 13.6°C | 13.1°C | 12.9°C | 13.1°C | -0.1°C |
| Avg Low | 4.0°C | 4.6°C | 4.1°C | 4.6°C | 4.2°C | +0.2°C |
| Avg Rain | 128 mm | 148 mm | 104 mm | 149 mm | 114 mm | -14 mm |
April temperatures in Olympia have risen by about 0.4°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -2.5°C (2008) to a record high of 29.7°C (1998).
Rainfall in April is one of the drier months, averaging 130 mm, with a wettest year of 243 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.1°C per decade, narrowing the gap between day and night.
A good time to visit Olympia
April is a good time to visit Olympia, with days averaging 13.2°C and nights around 4.3°C (mean 8.8°C, cooler than Olympia's yearly average) and higher rainfall. August and July 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 | 14.5°C | 9.6°C | 4.7°C | 19.2°C | 1.5°C | 86 mm | 83% | 0.2 m/s | 5 |
| 2024 | 13.0°C | 8.7°C | 4.3°C | 18.1°C | 0.5°C | 110 mm | 85% | 0.2 m/s | 4.6 |
| 2023 | 11.4°C | 7.7°C | 4.0°C | 27.2°C | 0.0°C | 199 mm | 89% | 0.2 m/s | 3.8 |
| 2022 | 10.6°C | 6.8°C | 3.0°C | 19.9°C | -1.1°C | 190 mm | 87% | 0.2 m/s | 4 |
| 2021 | 14.9°C | 9.7°C | 4.5°C | 26.9°C | -0.3°C | 42 mm | 79% | 0.3 m/s | 5.3 |
| 2020 | 14.3°C | 9.5°C | 4.7°C | 19.0°C | -0.3°C | 55 mm | 82% | 0.3 m/s | 4.8 |
| 2019 | 13.4°C | 9.2°C | 5.1°C | 17.8°C | 1.9°C | 122 mm | 86% | 0.2 m/s | 4 |
| 2018 | 13.0°C | 9.1°C | 5.2°C | 24.8°C | 0.8°C | 230 mm | 87% | 0.2 m/s | 3.7 |
| 2017 | 11.9°C | 8.3°C | 4.6°C | 18.0°C | 1.5°C | 206 mm | 88% | 0.2 m/s | 3.6 |
| 2016 🔥 | 16.8°C | 11.7°C | 6.6°C | 28.6°C | 2.7°C | 59 mm | 82% | 0.2 m/s | 4.7 |
| 2015 | 13.7°C | 8.8°C | 3.8°C | 23.3°C | 0.1°C | 65 mm | 83% | 0.3 m/s | 4.6 |
| 2014 | 13.5°C | 9.4°C | 5.2°C | 24.6°C | 3.1°C | 169 mm | 86% | 0.2 m/s | 4.3 |
| 2013 | 12.4°C | 8.5°C | 4.7°C | 19.7°C | 0.4°C | 164 mm | 85% | 0.2 m/s | 4 |
| 2012 | 12.8°C | 8.7°C | 4.5°C | 22.3°C | -1.0°C | 150 mm | 87% | 0.2 m/s | 4 |
| 2011 ❄️ | 9.9°C | 6.0°C | 2.0°C | 17.5°C | -1.4°C | 177 mm | 86% | 0.2 m/s | 3.8 |
| 2010 | 11.9°C | 8.1°C | 4.4°C | 17.7°C | 0.2°C | 145 mm | 86% | 0.2 m/s | 3.8 |
| 2009 | 13.3°C | 8.3°C | 3.3°C | 21.3°C | -0.9°C | 107 mm | 82% | 0.2 m/s | 4.5 |
| 2008 | 10.7°C | 6.3°C | 1.9°C | 22.2°C | -2.5°C | 70 mm | 85% | 0.2 m/s | 4 |
| 2007 | 12.5°C | 8.4°C | 4.2°C | 21.5°C | -1.4°C | 91 mm | 85% | 0.2 m/s | 4 |
| 2006 | 13.4°C | 8.9°C | 4.4°C | 20.9°C | 0.5°C | 87 mm | 84% | 0.2 m/s | 4.3 |
| 2005 | 13.3°C | 9.3°C | 5.3°C | 22.5°C | 2.4°C | 159 mm | 87% | 0.2 m/s | 4 |
| 2004 | 16.5°C | 10.9°C | 5.2°C | 29.3°C | 1.7°C | 52 mm | 81% | 0.2 m/s | 5.2 |
| 2003 | 12.0°C | 8.2°C | 4.5°C | 18.8°C | 1.5°C | 141 mm | 88% | 0.2 m/s | 3.6 |
| 2002 | 12.8°C | 8.6°C | 4.3°C | 19.2°C | 0.2°C | 125 mm | 85% | 0.2 m/s | 4.2 |
| 2001 | 11.9°C | 7.7°C | 3.5°C | 23.0°C | -0.2°C | 123 mm | 86% | 0.2 m/s | 4 |
| 2000 | 14.3°C | 9.6°C | 4.8°C | 21.9°C | -0.7°C | 83 mm | 84% | 0.2 m/s | 4.4 |
| 1999 | 13.1°C | 7.8°C | 2.6°C | 23.6°C | -0.3°C | 61 mm | 82% | 0.2 m/s | 4.5 |
| 1998 | 14.1°C | 9.1°C | 4.1°C | 29.7°C | 1.6°C | 53 mm | 83% | 0.2 m/s | 4.6 |
| 1997 | 13.1°C | 8.6°C | 4.0°C | 19.2°C | -1.5°C | 160 mm | 84% | 0.2 m/s | 4.1 |
| 1996 🌧️ | 13.4°C | 9.4°C | 5.5°C | 21.8°C | -0.4°C | 243 mm | 88% | 0.2 m/s | 3.4 |
| 1995 | 13.4°C | 8.8°C | 4.1°C | 21.2°C | -0.1°C | 130 mm | 84% | 0.2 m/s | 4.3 |
| 1994 | 14.2°C | 9.8°C | 5.5°C | 21.1°C | 1.2°C | 96 mm | 85% | 0.2 m/s | 3.7 |
| 1993 | 12.1°C | 8.5°C | 4.9°C | 18.3°C | 0.8°C | 216 mm | 89% | 0.2 m/s | 3.7 |
| 1992 | 14.3°C | 9.9°C | 5.6°C | 21.4°C | -0.4°C | 181 mm | 85% | 0.3 m/s | 3.9 |
| 1991 | 12.8°C | 8.3°C | 3.9°C | 21.3°C | 0.0°C | 230 mm | 85% | 0.2 m/s | 4.3 |
| 1990 | 15.3°C | 10.7°C | 6.0°C | 23.0°C | 2.0°C | 109 mm | 84% | 0.2 m/s | 4 |
| 1989 | 15.6°C | 10.3°C | 5.0°C | 23.5°C | 2.3°C | 92 mm | 83% | 0.2 m/s | 4.4 |
| 1988 | 13.8°C | 9.3°C | 4.8°C | 21.4°C | 0.8°C | 152 mm | 85% | 0.2 m/s | 3.6 |
| 1987 | 14.6°C | 9.8°C | 5.1°C | 27.2°C | 0.9°C | 108 mm | 84% | 0.2 m/s | 4.4 |
| 1986 | 11.7°C | 7.5°C | 3.2°C | 20.0°C | -0.5°C | 104 mm | 85% | 0.2 m/s | 3.7 |
| 1985 | 13.1°C | 8.7°C | 4.3°C | 22.8°C | -1.3°C | 110 mm | 85% | 0.2 m/s | 4.1 |
| 1984 | 11.4°C | 7.4°C | 3.4°C | 22.8°C | -0.1°C | 162 mm | 86% | 0.2 m/s | 4.1 |
| 1983 | 14.4°C | 9.1°C | 3.9°C | 23.4°C | 0.4°C | 71 mm | 81% | 0.3 m/s | — |
| 1982 | 11.3°C | 6.8°C | 2.3°C | 21.2°C | 0.2°C | 173 mm | 84% | 0.2 m/s | — |
| 1981 | 12.6°C | 8.3°C | 4.1°C | 23.7°C | -2.1°C | 178 mm | 87% | 0.2 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 13.2°C with lows near 4.3°C (mean 8.8°C), based on 45 years of NASA POWER data.
April averages 130 mm of rainfall in Olympia, one of the drier months. The wettest on record was 243 mm in 1996.
The hottest April reached 29.7°C in 1998. The coldest dipped to -2.5°C in 2008.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.4°C. Daytime highs moved from 12.6°C to 12.9°C and overnight lows from 3.6°C to 4.1°C over the same span.
April is one of the cooler months of the year in Olympia and one of the drier months, so plan for around 13.2°C daytime highs and 4.3°C at night.
Not quite — April is the 6th coolest month in Olympia, averaging 8.8°C.
For April in Olympia, pack warm layers and a jacket for chilly mornings, with typical highs of 13.2°C and lows of 4.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 85% — quite humid.
Average wind speed in April is 0.2 m/s. The windiest April on record averaged 0.3 m/s (1983).
The wettest April on record was 1996 with 243 mm. On average, April sees 130 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 Olympia 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.
