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August Weather in Somerville, United States

Last updated: June 24, 2025

In Somerville, United States, the average temperature in August hovers around 26°C (79°F). Expect a wide range, with minimums dipping to 16°C (61°F) and maximums soaring up to 36°C (97°F). During this period, precipitation averages 114 mm (4.5 in) over 11 days, contributing to a relatively high humidity level of 73%.

August Temperature in Somerville

In August in Somerville, the average temperature is 26°C (79°F). The maximum can reach 36°C (97°F) and the minimum can be as low as 16°C (61°F). It's an ideal time for travelers to enjoy warm weather while having the option to experience cooler evenings.

August Weather in Somerville: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Somerville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Somerville, August typically has an average temperature of 26°C (79°F), with highs reaching up to 36°C (97°F) and lows dropping to around 16°C (61°F).
JanFebMarAprMayJunJulAugSepOctNovDec424655617178817975645047
Data source: Temperature data for Somerville generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Somerville

In Somerville in August, the total precipitation amount is 114 mm (4.5 in) spread over 11 days.

August Precipitation Trends in Somerville

The chart displays monthly precipitation patterns in Somerville, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Somerville, August typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec10017216513510510912511411510575145
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Somerville

In Somerville in August, humidity is 73%. With an average temperature of 26°C (79°F), this humidity feels like a warm, sticky embrace, making travel slightly uncomfortable as you navigate through the heat with a constant sheen of sweat on your skin.

August Average Humidity in Somerville

This chart illustrates the average monthly humidity levels in Somerville, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Somerville is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%81%83%83%80%74%70%73%85%88%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Somerville

In Somerville in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Somerville.

Maximum UV Index Levels in Somerville for August

The chart shows the monthly maximum UV Index (UVI) for Somerville in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Somerville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
Data source: Somerville August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in Somerville Compares to Other Months

Weather in Somerville varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Somerville, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Somerville, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)100 mm (4.0 inches)86%moderate
February Weather8°C (46°F)172 mm (6.8 inches)85%high
March Weather13°C (55°F)165 mm (6.5 inches)84%very high
April Weather16°C (61°F)135 mm (5.3 inches)81%very high
May Weather22°C (72°F)105 mm (4.1 inches)83%extreme
June Weather26°C (78°F)109 mm (4.3 inches)83%extreme
July Weather27°C (81°F)124 mm (4.9 inches)80%extreme
August Weather26°C (79°F)114 mm (4.5 inches)73%very high
September Weather24°C (76°F)114 mm (4.5 inches)70%very high
October Weather18°C (65°F)105 mm (4.1 inches)73%high
November Weather10°C (51°F)75 mm (2.9 inches)85%moderate
December Weather8°C (47°F)145 mm (5.7 inches)88%moderate

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