March is one of the cooler months of the year in Olympia, with average highs near 10.5°C and lows around 2.9°C (mean 6.7°C). It is a relatively wet time of year, averaging 188 mm of rainfall and 89% relative humidity across the period.
March is one of the cooler months of the year in Olympia. Across 45 years of records, the warmest March in Olympia was 1992 — when the month averaged 9.9°C — while the coldest was 2009 at 4.3°C. Typical March days reach 10.5°C with nights near 2.9°C. The long-term March temperature trend is broadly flat.
March is a relatively wet time of year in Olympia, averaging 188 mm of rainfall. The wettest March on record was 2017 with 378 mm, while the driest was 2019 at 42 mm.
Relative humidity in Olympia during March averages 89%. The most humid March was 2025 at 94%, and the least humid was 1992 at 83%.
March receives about 2.9 kWh/m²/day of solar energy in Olympia. The sunniest March was 2019 at 3.7 kWh/m²/day, and the cloudiest was 2017 at 2.3.
Average wind speed in Olympia during March is 0.2 m/s. The windiest Marchs were 2005, 2015 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 | 6.8°C | 7.1°C | 6.3°C | 6.8°C | 6.3°C | -0.5°C |
| Avg High | 10.7°C | 11.2°C | 9.9°C | 10.5°C | 9.9°C | -0.8°C |
| Avg Low | 2.9°C | 3.0°C | 2.7°C | 3.2°C | 2.8°C | -0.1°C |
| Avg Rain | 198 mm | 173 mm | 174 mm | 227 mm | 157 mm | -42 mm |
March temperatures in Olympia have fallen by about 0.3°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -4.9°C (1989) to a record high of 23.1°C (1994).
Rainfall in March is a relatively wet time of year, averaging 188 mm, with a wettest year of 378 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.3°C per decade while lows rose 0°C per decade, narrowing the gap between day and night.
A good time to visit Olympia
March is a good time to visit Olympia, with days averaging 10.5°C and nights around 2.9°C (mean 6.7°C, cooler than Olympia's yearly average) and higher rainfall. August and July are marginally more temperate, but March still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 9.6°C | 6.8°C | 3.9°C | 19.4°C | 0.2°C | 222 mm | 94% | 0.2 m/s | 2.6 |
| 2024 | 11.1°C | 7.4°C | 3.8°C | 21.1°C | -0.6°C | 164 mm | 89% | 0.2 m/s | 3.1 |
| 2023 | 8.9°C | 5.2°C | 1.6°C | 16.3°C | -2.4°C | 171 mm | 90% | 0.2 m/s | 3 |
| 2022 | 10.4°C | 7.2°C | 3.9°C | 16.4°C | -2.4°C | 134 mm | 90% | 0.2 m/s | 2.9 |
| 2021 | 10.1°C | 5.9°C | 1.7°C | 17.0°C | -3.3°C | 124 mm | 86% | 0.3 m/s | 3.3 |
| 2020 | 9.2°C | 5.5°C | 1.9°C | 15.9°C | -3.0°C | 126 mm | 88% | 0.2 m/s | 3.2 |
| 2019 | 11.7°C | 6.9°C | 2.0°C | 20.2°C | -4.5°C | 42 mm | 83% | 0.2 m/s | 3.7 |
| 2018 | 10.1°C | 6.2°C | 2.3°C | 18.1°C | -0.9°C | 94 mm | 88% | 0.2 m/s | 3.1 |
| 2017 🌧️ | 9.0°C | 6.2°C | 3.4°C | 13.5°C | 0.2°C | 378 mm | 93% | 0.2 m/s | 2.3 |
| 2016 | 11.5°C | 8.0°C | 4.5°C | 20.5°C | 0.2°C | 302 mm | 89% | 0.2 m/s | 2.9 |
| 2015 | 13.3°C | 9.0°C | 4.8°C | 19.3°C | -2.6°C | 168 mm | 86% | 0.3 m/s | 3.1 |
| 2014 | 11.1°C | 7.4°C | 3.7°C | 17.8°C | -1.6°C | 357 mm | 90% | 0.2 m/s | 2.8 |
| 2013 | 10.6°C | 6.9°C | 3.3°C | 20.5°C | -1.5°C | 150 mm | 89% | 0.2 m/s | 2.9 |
| 2012 | 7.9°C | 4.9°C | 1.9°C | 15.7°C | -3.0°C | 307 mm | 91% | 0.2 m/s | 2.6 |
| 2011 | 8.6°C | 5.8°C | 2.9°C | 13.7°C | -1.1°C | 318 mm | 92% | 0.2 m/s | 2.4 |
| 2010 | 10.7°C | 6.8°C | 2.8°C | 16.9°C | -1.5°C | 159 mm | 88% | 0.2 m/s | 3.1 |
| 2009 ❄️ | 7.7°C | 4.3°C | 0.9°C | 11.9°C | -3.7°C | 158 mm | 89% | 0.2 m/s | 2.8 |
| 2008 | 8.1°C | 4.7°C | 1.3°C | 12.4°C | -1.0°C | 152 mm | 90% | 0.2 m/s | 2.7 |
| 2007 | 10.5°C | 7.0°C | 3.6°C | 17.5°C | -1.5°C | 219 mm | 91% | 0.2 m/s | 2.6 |
| 2006 | 9.7°C | 5.9°C | 2.2°C | 14.0°C | -2.0°C | 145 mm | 88% | 0.2 m/s | 2.9 |
| 2005 | 12.7°C | 8.5°C | 4.2°C | 20.2°C | 0.6°C | 185 mm | 88% | 0.3 m/s | 3.1 |
| 2004 | 11.7°C | 7.8°C | 4.0°C | 20.9°C | 1.8°C | 115 mm | 88% | 0.2 m/s | 3 |
| 2003 | 10.3°C | 7.3°C | 4.2°C | 16.9°C | -2.0°C | 330 mm | 92% | 0.2 m/s | 2.6 |
| 2002 | 7.8°C | 4.7°C | 1.6°C | 13.4°C | -2.5°C | 171 mm | 90% | 0.2 m/s | 2.6 |
| 2001 | 10.8°C | 6.6°C | 2.5°C | 17.4°C | -1.5°C | 122 mm | 89% | 0.2 m/s | 2.9 |
| 2000 | 9.5°C | 5.8°C | 2.1°C | 16.9°C | -1.3°C | 141 mm | 90% | 0.2 m/s | 3 |
| 1999 | 8.7°C | 5.2°C | 1.7°C | 18.7°C | -2.0°C | 202 mm | 90% | 0.2 m/s | 2.8 |
| 1998 | 10.7°C | 7.1°C | 3.4°C | 17.4°C | -1.9°C | 166 mm | 89% | 0.2 m/s | 3 |
| 1997 | 9.2°C | 6.1°C | 3.0°C | 15.4°C | -1.2°C | 366 mm | 91% | 0.2 m/s | 2.6 |
| 1996 | 11.4°C | 7.2°C | 2.9°C | 17.4°C | -3.4°C | 87 mm | 85% | 0.2 m/s | 3.1 |
| 1995 | 11.1°C | 6.9°C | 2.7°C | 18.5°C | -2.9°C | 225 mm | 86% | 0.2 m/s | 3 |
| 1994 | 12.2°C | 7.8°C | 3.4°C | 23.1°C | -2.8°C | 154 mm | 86% | 0.2 m/s | 3.1 |
| 1993 | 11.8°C | 7.5°C | 3.2°C | 14.9°C | -1.3°C | 181 mm | 88% | 0.2 m/s | 2.9 |
| 1992 🔥 | 15.3°C | 9.9°C | 4.6°C | 22.5°C | -0.5°C | 44 mm | 83% | 0.3 m/s | 3.5 |
| 1991 | 9.4°C | 5.7°C | 1.9°C | 17.7°C | -2.2°C | 163 mm | 89% | 0.2 m/s | 3.1 |
| 1990 | 11.9°C | 7.5°C | 3.1°C | 17.5°C | -1.8°C | 140 mm | 87% | 0.2 m/s | 3.1 |
| 1989 | 8.3°C | 5.2°C | 2.2°C | 12.7°C | -4.9°C | 274 mm | 93% | 0.2 m/s | 2.5 |
| 1988 | 10.5°C | 6.4°C | 2.2°C | 17.9°C | -2.3°C | 215 mm | 86% | 0.3 m/s | 2.9 |
| 1987 | 11.4°C | 7.5°C | 3.7°C | 21.0°C | -1.3°C | 241 mm | 88% | 0.2 m/s | 3.1 |
| 1986 | 12.1°C | 8.1°C | 4.1°C | 17.6°C | 0.3°C | 137 mm | 89% | 0.2 m/s | 2.8 |
| 1985 | 9.3°C | 5.0°C | 0.8°C | 14.7°C | -2.9°C | 162 mm | 88% | 0.2 m/s | 3.3 |
| 1984 | 11.7°C | 7.8°C | 4.0°C | 16.6°C | 0.1°C | 185 mm | 90% | 0.2 m/s | 3.1 |
| 1983 | 11.6°C | 8.0°C | 4.4°C | 15.6°C | 1.1°C | 279 mm | 90% | 0.2 m/s | — |
| 1982 | 9.6°C | 5.6°C | 1.6°C | 15.3°C | -1.1°C | 155 mm | 88% | 0.2 m/s | — |
| 1981 | 12.2°C | 7.7°C | 3.2°C | 17.0°C | -2.0°C | 137 mm | 86% | 0.2 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 10.5°C with lows near 2.9°C (mean 6.7°C), based on 45 years of NASA POWER data.
March averages 188 mm of rainfall in Olympia, a relatively wet time of year. The wettest on record was 378 mm in 2017.
The hottest March reached 23.1°C in 1994. The coldest dipped to -4.9°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have fallen by about 0.3°C — but days and nights have moved in opposite directions. Overnight lows rose from 2.8°C to 3°C while daytime highs eased from 10.9°C to 10°C, narrowing the gap between day and night.
March is one of the cooler months of the year in Olympia and a relatively wet time of year, so plan for around 10.5°C daytime highs and 2.9°C at night.
Not quite — March is the 5th coolest month in Olympia, averaging 6.7°C.
For March in Olympia, pack warm layers and a jacket for chilly mornings, with typical highs of 10.5°C and lows of 2.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 89% — quite humid.
Average wind speed in March is 0.2 m/s. The windiest March on record averaged 0.3 m/s (1988).
The wettest March on record was 2017 with 378 mm. On average, March sees 188 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 March, 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 March specifically, along with year-by-year records and how the month has changed over the decades.
