March is one of the cooler months of the year in Kennewick, with average highs near 13.6°C and lows around 2°C (mean 7.8°C). It is about average for rainfall, averaging 29 mm of rainfall and 65% relative humidity across the period.
March is one of the cooler months of the year in Kennewick. Across 45 years of records, the warmest March in Kennewick was 2015 — when the month averaged 11°C — while the coldest was 2009 at 5.3°C. Typical March days reach 13.6°C with nights near 2°C. The long-term March temperature trend is broadly flat.
March is about average for rainfall in Kennewick, averaging 29 mm of rainfall. The wettest March on record was 1983 with 60 mm, while the driest were 1992 and 2021 at 9 mm.
Relative humidity in Kennewick during March averages 65%. The most humid Marchs were 2017 and 2025 at 73%, and the least humid was 2005 at 58%.
March receives about 3.7 kWh/m²/day of solar energy in Kennewick. The sunniest Marchs were 1990, 1992 and 2021 at 4.2 kWh/m²/day, and the cloudiest was 2017 at 3.1.
Average wind speed in Kennewick during March is 2.6 m/s. The windiest Marchs were 2002 and 2012 at 3.3 m/s, while the calmest was 1992 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.6°C | 7.7°C | 7.7°C | 8.1°C | 7.7°C | +0.1°C |
| Avg High | 13.3°C | 13.8°C | 13.4°C | 13.8°C | 13.5°C | +0.2°C |
| Avg Low | 1.9°C | 1.7°C | 2.1°C | 2.4°C | 1.9°C | 0°C |
| Avg Rain | 37 mm | 26 mm | 25 mm | 31 mm | 25 mm | -12 mm |
March temperatures in Kennewick have risen by about 0.4°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -10.1°C (1989) to a record high of 26.1°C (2004).
Rainfall in March is about average for rainfall, averaging 29 mm, with a wettest year of 60 mm.
A good time to visit Kennewick
March is a good time to visit Kennewick, with days averaging 13.6°C and nights around 2°C (mean 7.8°C, cooler than Kennewick's yearly average) and low 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 | 13.7°C | 8.2°C | 2.6°C | 22.8°C | -2.9°C | 46 mm | 73% | 3 m/s | 3.5 |
| 2024 | 14.3°C | 8.5°C | 2.6°C | 25.4°C | -4.3°C | 20 mm | 62% | 2.5 m/s | 4.1 |
| 2023 | 10.9°C | 5.7°C | 0.5°C | 17.7°C | -3.0°C | 27 mm | 65% | 2.6 m/s | 3.5 |
| 2022 | 14.5°C | 9.0°C | 3.4°C | 20.3°C | -4.6°C | 28 mm | 65% | 2.3 m/s | 3.9 |
| 2021 | 14.7°C | 8.1°C | 1.5°C | 21.5°C | -1.9°C | 9 mm | 59% | 2.6 m/s | 4.2 |
| 2020 | 12.6°C | 6.8°C | 1.0°C | 18.1°C | -5.4°C | 18 mm | 61% | 2.8 m/s | 4 |
| 2019 | 12.1°C | 6.3°C | 0.6°C | 22.5°C | -8.6°C | 16 mm | 65% | 2.1 m/s | 3.7 |
| 2018 | 13.0°C | 7.1°C | 1.3°C | 19.8°C | -2.7°C | 23 mm | 65% | 2.6 m/s | 3.8 |
| 2017 | 13.4°C | 8.2°C | 3.1°C | 20.4°C | -1.2°C | 57 mm | 73% | 2.8 m/s | 3.1 |
| 2016 | 14.8°C | 9.2°C | 3.6°C | 22.9°C | -2.1°C | 37 mm | 64% | 3 m/s | 3.7 |
| 2015 🔥 | 17.0°C | 11.0°C | 5.0°C | 24.8°C | -4.1°C | 22 mm | 59% | 2.4 m/s | 3.8 |
| 2014 | 13.9°C | 8.2°C | 2.4°C | 19.4°C | -5.7°C | 42 mm | 64% | 2.9 m/s | 3.8 |
| 2013 | 14.4°C | 8.5°C | 2.6°C | 24.0°C | -2.9°C | 14 mm | 63% | 2.5 m/s | 3.7 |
| 2012 | 12.2°C | 6.9°C | 1.7°C | 19.3°C | -4.1°C | 45 mm | 66% | 3.3 m/s | 3.3 |
| 2011 | 12.6°C | 7.2°C | 1.8°C | 18.2°C | -2.1°C | 41 mm | 70% | 2.9 m/s | 3.3 |
| 2010 | 14.7°C | 8.4°C | 2.1°C | 21.2°C | -3.8°C | 16 mm | 60% | 2.5 m/s | 3.9 |
| 2009 ❄️ | 10.3°C | 5.3°C | 0.2°C | 18.3°C | -5.4°C | 41 mm | 66% | 3.1 m/s | 3.6 |
| 2008 | 11.4°C | 6.2°C | 1.1°C | 16.4°C | -2.7°C | 21 mm | 63% | 2.9 m/s | 3.6 |
| 2007 | 15.0°C | 9.1°C | 3.2°C | 22.9°C | -2.3°C | 22 mm | 66% | 2.5 m/s | 3.5 |
| 2006 | 12.2°C | 6.7°C | 1.2°C | 18.9°C | -3.5°C | 24 mm | 65% | 2.4 m/s | 3.7 |
| 2005 | 16.2°C | 10.0°C | 3.9°C | 23.5°C | 0.4°C | 23 mm | 58% | 2.8 m/s | 3.8 |
| 2004 | 16.2°C | 9.9°C | 3.6°C | 26.1°C | -0.6°C | 13 mm | 62% | 2.9 m/s | 3.9 |
| 2003 | 14.4°C | 9.2°C | 4.0°C | 24.8°C | -2.2°C | 28 mm | 67% | 3.1 m/s | 3.5 |
| 2002 | 11.0°C | 5.7°C | 0.5°C | 19.5°C | -3.7°C | 17 mm | 63% | 3.3 m/s | 3.4 |
| 2001 | 14.4°C | 8.0°C | 1.6°C | 21.4°C | -3.8°C | 28 mm | 65% | 2.5 m/s | 3.7 |
| 2000 | 12.9°C | 7.1°C | 1.2°C | 18.8°C | -3.4°C | 33 mm | 66% | 2.4 m/s | 3.8 |
| 1999 | 12.7°C | 7.2°C | 1.7°C | 20.8°C | -2.8°C | 12 mm | 63% | 2.7 m/s | 3.6 |
| 1998 | 13.4°C | 7.9°C | 2.3°C | 19.3°C | -4.5°C | 23 mm | 67% | 2.2 m/s | 3.8 |
| 1997 | 13.0°C | 7.7°C | 2.4°C | 23.4°C | -3.0°C | 41 mm | 69% | 3.1 m/s | 3.5 |
| 1996 | 12.3°C | 6.5°C | 0.6°C | 18.3°C | -5.8°C | 35 mm | 66% | 2.5 m/s | 3.7 |
| 1995 | 13.6°C | 7.7°C | 1.8°C | 21.3°C | -5.8°C | 40 mm | 62% | 2.5 m/s | 3.8 |
| 1994 | 15.2°C | 8.6°C | 2.0°C | 23.9°C | -4.8°C | 9 mm | 59% | 2.5 m/s | 4 |
| 1993 | 13.3°C | 7.4°C | 1.6°C | 22.6°C | -3.6°C | 37 mm | 71% | 2 m/s | 3.2 |
| 1992 | 17.2°C | 10.2°C | 3.3°C | 23.4°C | -0.3°C | 9 mm | 62% | 1.7 m/s | 4.2 |
| 1991 | 12.1°C | 6.1°C | 0.2°C | 20.8°C | -3.4°C | 37 mm | 65% | 2.7 m/s | 3.7 |
| 1990 | 14.7°C | 7.9°C | 1.2°C | 22.5°C | -4.2°C | 19 mm | 62% | 2.1 m/s | 4.2 |
| 1989 | 11.2°C | 6.0°C | 0.7°C | 20.7°C | -10.1°C | 53 mm | 70% | 2.6 m/s | 3.4 |
| 1988 | 14.0°C | 7.8°C | 1.5°C | 20.2°C | -2.9°C | 29 mm | 60% | 3.1 m/s | 3.7 |
| 1987 | 14.0°C | 8.3°C | 2.7°C | 21.6°C | -5.0°C | 40 mm | 65% | 2.6 m/s | 3.9 |
| 1986 | 14.9°C | 9.1°C | 3.2°C | 23.0°C | -0.4°C | 32 mm | 70% | 2.2 m/s | 3.6 |
| 1985 | 12.1°C | 5.8°C | -0.4°C | 17.5°C | -4.3°C | 22 mm | 65% | 2.5 m/s | 4 |
| 1984 | 13.6°C | 8.1°C | 2.7°C | 19.0°C | -2.6°C | 50 mm | 69% | 2.5 m/s | 3.5 |
| 1983 🌧️ | 14.1°C | 8.9°C | 3.6°C | 19.6°C | -1.6°C | 60 mm | 71% | 2.5 m/s | — |
| 1982 | 11.6°C | 6.3°C | 1.1°C | 19.0°C | -2.4°C | 26 mm | 67% | 2.6 m/s | — |
| 1981 | 14.6°C | 8.3°C | 1.9°C | 21.3°C | -2.4°C | 23 mm | 62% | 2.4 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 13.6°C with lows near 2°C (mean 7.8°C), based on 45 years of NASA POWER data.
March averages 29 mm of rainfall in Kennewick, about average for rainfall. The wettest on record was 60 mm in 1983.
The hottest March reached 26.1°C in 2004. The coldest dipped to -10.1°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 0.4°C. Daytime highs moved from 13.2°C to 13.6°C and overnight lows from 1.8°C to 2.1°C over the same span.
March is one of the cooler months of the year in Kennewick and about average for rainfall, so plan for around 13.6°C daytime highs and 2°C at night.
Not quite — March is the 5th coolest month in Kennewick, averaging 7.8°C.
For March in Kennewick, pack warm layers and a jacket for chilly mornings, with typical highs of 13.6°C and lows of 2°C.
Relative humidity in March averages 65% — moderately humid.
Average wind speed in March is 2.6 m/s. The windiest March on record averaged 3.3 m/s (2002).
The wettest March on record was 1983 with 60 mm. On average, March sees 29 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 Kennewick 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.
