April is one of the cooler months of the year in Somerville, with average highs near 12.5°C and lows around 2.1°C (mean 7.3°C). It is about average for rainfall, averaging 107 mm of rainfall and 80% relative humidity across the period.
April is one of the cooler months of the year in Somerville. Across 45 years of records, the warmest April in Somerville was 2010 — when the month averaged 9.6°C — while the coldest were 1982 and 2003 at 5°C. Typical April days reach 12.5°C with nights near 2.1°C. The long-term trend is warming, about 0.3°C per decade.
April is about average for rainfall in Somerville, averaging 107 mm of rainfall. The wettest April on record was 1987 with 239 mm, while the driest was 1999 at 22 mm.
Relative humidity in Somerville during April averages 80%. The most humid April was 1987 at 87%, and the least humid was 2012 at 73%.
April receives about 4.6 kWh/m²/day of solar energy in Somerville. The sunniest April was 2012 at 5.4 kWh/m²/day, and the cloudiest was 1987 at 3.7.
Average wind speed in Somerville during April is 0.6 m/s. The windiest Aprils were 1982 and 2020 at 0.8 m/s, while the calmest was 1991 at 0.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.9°C | 6.9°C | 7.4°C | 7.8°C | 7.8°C | +0.9°C |
| Avg High | 11.9°C | 12.1°C | 12.7°C | 13.0°C | 12.8°C | +0.9°C |
| Avg Low | 1.9°C | 1.7°C | 2.1°C | 2.5°C | 2.8°C | +0.9°C |
| Avg Rain | 115 mm | 97 mm | 116 mm | 98 mm | 110 mm | -5 mm |
April temperatures in Somerville have risen by about 1.3°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -10.5°C (1982) to a record high of 30.1°C (2002).
Rainfall in April is about average for rainfall, averaging 107 mm, with a wettest year of 239 mm.
A good time to visit Somerville
April is a good time to visit Somerville, with days averaging 12.5°C and nights around 2.1°C (mean 7.3°C, cooler than Somerville's yearly average) and higher rainfall. July and August 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 | 13.6°C | 8.3°C | 3.0°C | 22.0°C | -3.5°C | 95 mm | 76% | 0.7 m/s | 4.7 |
| 2024 | 12.7°C | 7.9°C | 3.1°C | 20.4°C | -3.3°C | 98 mm | 82% | 0.7 m/s | 4.5 |
| 2023 | 14.5°C | 9.3°C | 4.1°C | 27.1°C | -4.1°C | 119 mm | 79% | 0.6 m/s | 4.5 |
| 2022 | 12.8°C | 7.7°C | 2.6°C | 18.4°C | -0.6°C | 96 mm | 76% | 0.7 m/s | 4.8 |
| 2021 | 13.2°C | 8.0°C | 2.9°C | 22.0°C | -4.0°C | 112 mm | 78% | 0.7 m/s | 4.7 |
| 2020 | 10.1°C | 5.7°C | 1.3°C | 17.5°C | -3.3°C | 143 mm | 80% | 0.8 m/s | 4.2 |
| 2019 | 13.0°C | 8.0°C | 3.0°C | 19.7°C | -4.1°C | 167 mm | 81% | 0.7 m/s | 4.3 |
| 2018 | 10.5°C | 5.5°C | 0.5°C | 20.0°C | -4.3°C | 149 mm | 80% | 0.7 m/s | 4.3 |
| 2017 | 14.3°C | 9.2°C | 4.1°C | 25.5°C | -3.9°C | 137 mm | 84% | 0.6 m/s | 4.3 |
| 2016 | 11.8°C | 6.3°C | 0.8°C | 22.3°C | -7.9°C | 71 mm | 76% | 0.7 m/s | 5.2 |
| 2015 | 12.3°C | 7.0°C | 1.8°C | 19.1°C | -3.6°C | 68 mm | 80% | 0.6 m/s | 4.6 |
| 2014 | 12.2°C | 6.8°C | 1.5°C | 20.1°C | -5.1°C | 93 mm | 81% | 0.7 m/s | 4.9 |
| 2013 | 13.2°C | 7.6°C | 2.0°C | 21.0°C | -3.4°C | 48 mm | 75% | 0.7 m/s | 5.3 |
| 2012 | 14.7°C | 9.1°C | 3.6°C | 27.7°C | -1.8°C | 80 mm | 73% | 0.6 m/s | 5.4 |
| 2011 | 13.3°C | 8.4°C | 3.6°C | 23.8°C | -2.4°C | 122 mm | 81% | 0.6 m/s | 4.1 |
| 2010 🔥 | 14.9°C | 9.6°C | 4.3°C | 24.8°C | 0.5°C | 47 mm | 82% | 0.6 m/s | 4.9 |
| 2009 | 13.4°C | 8.2°C | 3.0°C | 27.3°C | -1.7°C | 112 mm | 79% | 0.6 m/s | 5 |
| 2008 | 13.9°C | 8.3°C | 2.7°C | 25.4°C | -3.6°C | 87 mm | 79% | 0.6 m/s | 5 |
| 2007 | 10.3°C | 5.8°C | 1.3°C | 23.0°C | -4.7°C | 199 mm | 83% | 0.7 m/s | 4 |
| 2006 | 13.6°C | 8.1°C | 2.6°C | 20.0°C | -2.2°C | 69 mm | 77% | 0.6 m/s | 5 |
| 2005 | 14.1°C | 8.3°C | 2.4°C | 24.3°C | -1.7°C | 124 mm | 79% | 0.6 m/s | 5.1 |
| 2004 | 12.9°C | 7.6°C | 2.4°C | 22.8°C | -3.1°C | 188 mm | 80% | 0.6 m/s | 4.5 |
| 2003 | 9.9°C | 5.0°C | 0.0°C | 23.2°C | -5.5°C | 109 mm | 83% | 0.7 m/s | 4.4 |
| 2002 | 14.8°C | 8.8°C | 2.9°C | 30.1°C | -4.7°C | 86 mm | 75% | 0.6 m/s | 4.7 |
| 2001 | 12.9°C | 7.1°C | 1.4°C | 23.8°C | -3.8°C | 33 mm | 78% | 0.6 m/s | 5.3 |
| 2000 | 11.2°C | 6.5°C | 1.8°C | 19.9°C | -2.4°C | 157 mm | 82% | 0.7 m/s | 3.8 |
| 1999 | 13.3°C | 7.7°C | 2.1°C | 18.7°C | -2.4°C | 22 mm | 74% | 0.6 m/s | 5.1 |
| 1998 | 13.1°C | 7.8°C | 2.6°C | 21.3°C | -1.1°C | 89 mm | 79% | 0.6 m/s | 4.5 |
| 1997 | 10.9°C | 5.9°C | 0.8°C | 19.8°C | -4.8°C | 113 mm | 80% | 0.7 m/s | 5.2 |
| 1996 | 11.2°C | 6.4°C | 1.6°C | 22.0°C | -4.4°C | 171 mm | 83% | 0.7 m/s | 4.5 |
| 1995 | 11.7°C | 6.0°C | 0.4°C | 18.5°C | -7.2°C | 56 mm | 75% | 0.6 m/s | 4.9 |
| 1994 | 13.1°C | 7.8°C | 2.5°C | 23.1°C | -2.2°C | 63 mm | 82% | 0.6 m/s | 4.8 |
| 1993 | 11.7°C | 6.9°C | 2.0°C | 17.8°C | -2.8°C | 135 mm | 85% | 0.6 m/s | 4.2 |
| 1992 | 10.4°C | 5.3°C | 0.2°C | 20.0°C | -3.7°C | 70 mm | 80% | 0.6 m/s | 4.5 |
| 1991 | 13.6°C | 8.3°C | 2.9°C | 22.7°C | -2.8°C | 126 mm | 81% | 0.5 m/s | 4.6 |
| 1990 | 11.9°C | 7.0°C | 2.2°C | 28.0°C | -3.4°C | 128 mm | 83% | 0.6 m/s | 4.1 |
| 1989 | 11.0°C | 5.9°C | 0.8°C | 17.8°C | -3.7°C | 116 mm | 78% | 0.6 m/s | 4.7 |
| 1988 | 11.1°C | 6.6°C | 2.2°C | 16.8°C | -2.8°C | 75 mm | 82% | 0.6 m/s | 3.9 |
| 1987 🌧️ | 11.4°C | 6.9°C | 2.4°C | 20.0°C | -3.6°C | 239 mm | 87% | 0.6 m/s | 3.7 |
| 1986 | 12.9°C | 7.8°C | 2.8°C | 20.7°C | -1.3°C | 55 mm | 82% | 0.6 m/s | 4.5 |
| 1985 | 13.0°C | 7.4°C | 1.8°C | 22.5°C | -4.6°C | 38 mm | 76% | 0.6 m/s | 4.7 |
| 1984 | 11.6°C | 6.8°C | 2.0°C | 21.7°C | -3.4°C | 122 mm | 84% | 0.6 m/s | 4.5 |
| 1983 | 11.9°C | 7.5°C | 3.1°C | 23.7°C | -1.2°C | 200 mm | 86% | 0.6 m/s | — |
| 1982 ❄️ | 10.6°C | 5.0°C | -0.6°C | 21.4°C | -10.5°C | 92 mm | 81% | 0.8 m/s | — |
| 1981 | 13.6°C | 7.9°C | 2.2°C | 20.1°C | -4.4°C | 99 mm | 77% | 0.7 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 12.5°C with lows near 2.1°C (mean 7.3°C), based on 45 years of NASA POWER data.
April averages 107 mm of rainfall in Somerville, about average for rainfall. The wettest on record was 239 mm in 1987.
The hottest April reached 30.1°C in 2002. The coldest dipped to -10.5°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.3°C. Daytime highs moved from 12.1°C to 13.4°C and overnight lows from 1.7°C to 3.1°C over the same span.
April is one of the cooler months of the year in Somerville and about average for rainfall, so plan for around 12.5°C daytime highs and 2.1°C at night.
Not quite — April is the 6th coolest month in Somerville, averaging 7.3°C.
For April in Somerville, pack warm layers and a jacket for chilly mornings, with typical highs of 12.5°C and lows of 2.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 80% — quite humid.
Average wind speed in April is 0.6 m/s. The windiest April on record averaged 0.8 m/s (1982).
The wettest April on record was 1987 with 239 mm. On average, April sees 107 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 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.
