March is one of the warmer months of the year in Somerville, with average highs near 23.7°C and lows around 14.1°C (mean 18.9°C). It is one of the drier months, averaging 48 mm of rainfall and 68% relative humidity across the period.
March is one of the warmer months of the year in Somerville. Across 45 years of records, the warmest March in Somerville was 2017 — when the month averaged 21°C — while the coldest was 1987 at 16.3°C. Typical March days reach 23.7°C with nights near 14.1°C. The long-term trend is warming, about 0.2°C per decade.
March is one of the drier months in Somerville, averaging 48 mm of rainfall. The wettest March on record was 1989 with 99 mm, while the driest was 2024 at 10 mm.
Relative humidity in Somerville during March averages 68%. The most humid March was 2020 at 76%, and the least humid was 2008 at 61%.
March receives about 4.8 kWh/m²/day of solar energy in Somerville. The sunniest Marchs were 2006 and 2024 at 5.3 kWh/m²/day, and the cloudiest was 1989 at 4.3.
Average wind speed in Somerville during March is 3.1 m/s. The windiest Marchs were 1984 and 1987 at 3.6 m/s, while the calmest was 1994 at 2.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 18.9°C | 18.2°C | 18.9°C | 19.4°C | 19.0°C | +0.1°C |
| Avg High | 23.9°C | 22.9°C | 23.8°C | 24.1°C | 23.5°C | -0.4°C |
| Avg Low | 13.9°C | 13.5°C | 14.0°C | 14.6°C | 14.5°C | +0.6°C |
| Avg Rain | 59 mm | 40 mm | 37 mm | 47 mm | 67 mm | +8 mm |
March temperatures in Somerville have risen by about 0.3°C between 1981–1985 and 2021–2025.
March has ranged from a record low of 8.2°C (1987) to a record high of 37°C (1989).
Rainfall in March is one of the drier months, averaging 48 mm, with a wettest year of 99 mm.
One of the best times to visit Somerville
March is one of the best times to visit Somerville. Expect days averaging 23.7°C and nights around 14.1°C (mean 18.9°C) — warmer than Somerville's yearly average — with moderate rainfall (48 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 | 25.8°C | 20.7°C | 15.6°C | 33.8°C | 12.6°C | 67 mm | 68% | 2.9 m/s | 5 |
| 2024 | 25.6°C | 20.2°C | 14.9°C | 36.8°C | 11.0°C | 10 mm | 64% | 3 m/s | 5.3 |
| 2023 | 22.9°C | 18.6°C | 14.2°C | 33.9°C | 11.3°C | 75 mm | 72% | 3.2 m/s | 4.6 |
| 2022 | 23.9°C | 19.6°C | 15.3°C | 31.2°C | 12.6°C | 75 mm | 75% | 3 m/s | 4.7 |
| 2021 | 21.6°C | 17.6°C | 13.6°C | 28.2°C | 11.2°C | 75 mm | 75% | 2.9 m/s | 4.5 |
| 2020 | 21.3°C | 17.3°C | 13.3°C | 28.4°C | 10.9°C | 97 mm | 76% | 3.2 m/s | 4.6 |
| 2019 | 25.2°C | 20.1°C | 15.0°C | 37.0°C | 10.5°C | 41 mm | 64% | 3.2 m/s | 4.8 |
| 2018 | 24.4°C | 19.5°C | 14.6°C | 34.4°C | 10.4°C | 36 mm | 63% | 3.5 m/s | 5.1 |
| 2017 🔥 | 26.5°C | 21.0°C | 15.6°C | 32.1°C | 10.0°C | 46 mm | 68% | 2.8 m/s | 5.2 |
| 2016 | 24.5°C | 19.9°C | 15.2°C | 36.9°C | 10.9°C | 48 mm | 70% | 3 m/s | 4.4 |
| 2015 | 22.3°C | 17.7°C | 13.1°C | 30.7°C | 9.8°C | 31 mm | 68% | 3.4 m/s | 4.8 |
| 2014 | 24.5°C | 19.4°C | 14.3°C | 32.1°C | 11.7°C | 35 mm | 69% | 2.9 m/s | 4.7 |
| 2013 | 25.9°C | 20.9°C | 15.8°C | 33.8°C | 11.5°C | 42 mm | 63% | 3.3 m/s | 5 |
| 2012 | 21.7°C | 17.8°C | 13.9°C | 28.5°C | 11.6°C | 66 mm | 74% | 3.5 m/s | 4.5 |
| 2011 | 21.9°C | 17.7°C | 13.6°C | 28.3°C | 9.8°C | 46 mm | 74% | 3.1 m/s | 4.4 |
| 2010 | 24.3°C | 19.7°C | 15.1°C | 30.9°C | 11.8°C | 77 mm | 70% | 2.9 m/s | 4.7 |
| 2009 | 23.2°C | 18.5°C | 13.9°C | 30.9°C | 11.1°C | 45 mm | 69% | 3.2 m/s | 4.5 |
| 2008 | 25.7°C | 19.9°C | 14.1°C | 36.5°C | 9.7°C | 32 mm | 61% | 3 m/s | 5.2 |
| 2007 | 24.1°C | 19.3°C | 14.4°C | 33.4°C | 10.1°C | 46 mm | 66% | 3.4 m/s | 5.1 |
| 2006 | 25.1°C | 19.9°C | 14.7°C | 34.5°C | 12.4°C | 24 mm | 68% | 2.9 m/s | 5.3 |
| 2005 | 22.5°C | 17.7°C | 12.9°C | 32.6°C | 8.9°C | 17 mm | 69% | 3.1 m/s | 4.8 |
| 2004 | 22.7°C | 18.1°C | 13.5°C | 30.9°C | 11.0°C | 28 mm | 66% | 3.2 m/s | 4.7 |
| 2003 | 22.8°C | 18.3°C | 13.7°C | 30.7°C | 11.0°C | 43 mm | 71% | 3.5 m/s | 4.6 |
| 2002 | 23.3°C | 18.6°C | 13.8°C | 33.3°C | 10.9°C | 28 mm | 67% | 3.4 m/s | 4.7 |
| 2001 | 23.6°C | 18.8°C | 14.0°C | 32.5°C | 11.8°C | 87 mm | 67% | 3.5 m/s | 4.6 |
| 2000 | 25.0°C | 19.9°C | 14.8°C | 33.8°C | 10.8°C | 21 mm | 66% | 3.2 m/s | 5 |
| 1999 | 23.0°C | 18.5°C | 14.0°C | 30.0°C | 10.2°C | 67 mm | 70% | 3.3 m/s | 4.6 |
| 1998 | 23.7°C | 18.7°C | 13.6°C | 35.6°C | 10.5°C | 18 mm | 67% | 3.1 m/s | 4.7 |
| 1997 | 22.4°C | 17.8°C | 13.2°C | 30.6°C | 10.5°C | 22 mm | 68% | 3.3 m/s | 4.4 |
| 1996 | 23.1°C | 18.0°C | 13.0°C | 29.0°C | 8.6°C | 55 mm | 69% | 3.2 m/s | 4.8 |
| 1995 | 21.7°C | 17.3°C | 13.0°C | 30.4°C | 8.6°C | 64 mm | 70% | 3.3 m/s | 4.9 |
| 1994 | 21.7°C | 17.2°C | 12.8°C | 27.7°C | 10.2°C | 23 mm | 71% | 2.7 m/s | 4.7 |
| 1993 | 22.1°C | 17.9°C | 13.7°C | 27.8°C | 10.3°C | 41 mm | 75% | 3 m/s | 4.5 |
| 1992 | 23.7°C | 19.1°C | 14.5°C | 32.7°C | 10.2°C | 44 mm | 72% | 2.8 m/s | 4.4 |
| 1991 | 23.3°C | 18.0°C | 12.6°C | 36.6°C | 9.6°C | 39 mm | 65% | 3.1 m/s | 4.8 |
| 1990 | 24.3°C | 19.3°C | 14.2°C | 31.4°C | 10.2°C | 29 mm | 66% | 3 m/s | 5.1 |
| 1989 🌧️ | 24.1°C | 19.7°C | 15.2°C | 37.0°C | 11.2°C | 99 mm | 72% | 2.9 m/s | 4.3 |
| 1988 | 24.8°C | 19.5°C | 14.3°C | 33.2°C | 11.2°C | 36 mm | 66% | 3 m/s | 4.9 |
| 1987 ❄️ | 20.9°C | 16.3°C | 11.6°C | 30.5°C | 8.2°C | 46 mm | 68% | 3.6 m/s | 4.6 |
| 1986 | 25.3°C | 19.6°C | 13.8°C | 35.6°C | 9.8°C | 12 mm | 63% | 3.2 m/s | 5.1 |
| 1985 | 25.7°C | 20.4°C | 15.1°C | 34.5°C | 11.1°C | 52 mm | 67% | 3 m/s | 4.7 |
| 1984 | 22.0°C | 17.2°C | 12.4°C | 31.4°C | 8.7°C | 79 mm | 67% | 3.6 m/s | 4.5 |
| 1983 | 24.6°C | 19.9°C | 15.3°C | 34.9°C | 10.3°C | 71 mm | 68% | 3.1 m/s | — |
| 1982 | 24.6°C | 19.4°C | 14.2°C | 33.9°C | 11.2°C | 61 mm | 67% | 3 m/s | — |
| 1981 | 23.1°C | 18.3°C | 13.5°C | 32.1°C | 10.7°C | 73 mm | 66% | 3.2 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 23.7°C with lows near 14.1°C (mean 18.9°C), based on 45 years of NASA POWER data.
March averages 48 mm of rainfall in Somerville, one of the drier months. The wettest on record was 99 mm in 1989.
The hottest March reached 37°C in 1989. The coldest dipped to 8.2°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 0.3°C. Daytime highs moved from 24°C to 24°C and overnight lows from 14.1°C to 14.7°C over the same span.
March is one of the warmer months of the year in Somerville and one of the drier months, so plan for around 23.7°C daytime highs and 14.1°C at night.
Not quite — March is the 10th coolest month in Somerville, averaging 18.9°C.
For March in Somerville, pack light layers you can adjust through the day, with typical highs of 23.7°C and lows of 14.1°C.
Relative humidity in March averages 68% — moderately humid.
Average wind speed in March is 3.1 m/s. The windiest March on record averaged 3.6 m/s (1984).
The wettest March on record was 1989 with 99 mm. On average, March sees 48 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 Somerville 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.
