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Weather in Boston for August 2025

Your guide to Boston weather in August - trends and predictions

    Temperatures

  • Until now, August 2025 in Boston has been nearly identical to the historical average, with a temperature of 22.4 °C (showing only a slight deviation of -0.3 °C).

  • Expect cooler weather in the next days in Boston with the forecast suggesting a temperature of 21.3 °C, lower than the historical average.

  • In general, the average temperature in Boston at the beginning of August is 21.7 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 23.1 °C by the end of August.

    • Rain 🌧️

  • Boston experiences moderate rainfall in August, with an average of 8 rainy days and a total precipitation of 30 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
23
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/13°
Temperatures
Average wind speed
26 km/h
Avg max wind
Average humidity
65 %
Avg humidity

Boston Weather August

Move between months or click on a day
July
September
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Light rain shower
19°
2
Cloudy
22°
3
Light rain shower
23°
4
Light drizzle
21°
5
Patchy rain possible
20°
6
Partly cloudy
24°
7
Patchy rain possible
23°
8
Overcast
25°
9
Cloudy
24°
10
Partly cloudy
25°
11
Partly cloudy
28°
12
Sunny
25°
13
Sunny
27°
14
Cloudy
28°
15
Sunny
25°
16
Partly cloudy
21°
17
Partly cloudy
21°
18
Patchy rain possible
20°
19
Partly cloudy
21°
20
Patchy rain possible
20°
21
Overcast
19°
22
Moderate or heavy rain shower
22°
23
Moderate rain at times
20°
24
Moderate or heavy rain shower
21°
25
Sunny
27°
26
Sunny
26°
27
Patchy rain possible
24°
28
Patchy rain possible
23°
29
Patchy rain possible
20°
30
Patchy rain possible
23°
31
Patchy rain possible
19°

Temperatures trend during August in Boston

See the weather trend as well as the moving average line

August weather in Boston day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
1 Aug. Light rain shower
Light rain shower
 19° /12° 1.9 mm 4
2 Aug. Cloudy
Cloudy
 22° /13° 0 mm 5
3 Aug. Light rain shower
Light rain shower
 23° /12° 2.1 mm 5
4 Aug. Light drizzle
Light drizzle
 21° /13° 1 mm 5
5 Aug. Patchy rain possible
Patchy rain possible
 20° /11° 0.1 mm 5
6 Aug. Partly cloudy
Partly cloudy
 24° /10° 0 mm 6
7 Aug. Patchy rain possible
Patchy rain possible
 23° /13° 0.1 mm 5
8 Aug. Overcast
Overcast
 25° /12° 0 mm 6
9 Aug. Cloudy
Cloudy
 24° /11° 0 mm 5
10 Aug. Partly cloudy
Partly cloudy
 25° /12° 0 mm 7
11 Aug. Partly cloudy
Partly cloudy
 28° /15° 0.1 mm 7
12 Aug. Sunny
Sunny
 25° /17° 0 mm 7
13 Aug. Sunny
Sunny
 27° /16° 0.1 mm 7
14 Aug. Cloudy
Cloudy
 28° /16° 0.1 mm 6
15 Aug. Sunny
Sunny
 25° /15° 0 mm 7
16 Aug. Partly cloudy
Partly cloudy
 21° /13° 0 mm 6
17 Aug. Partly cloudy
Partly cloudy
 21° /12° 0 mm 6
18 Aug. Patchy rain possible
Patchy rain possible
 20° /14° 0 mm 5
19 Aug. Partly cloudy
Partly cloudy
 21° /12° 1.1 mm 5
20 Aug. Patchy rain possible
Patchy rain possible
 20° /13° 0.1 mm 5
21 Aug. Overcast
Overcast
 19° /11° 0 mm 5
22 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 22° /11° 3 mm 6
23 Aug. Moderate rain at times
Moderate rain at times
 20° /13° 1.8 mm 5
24 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
 21° /12° 6 mm 5
25 Aug. Sunny
Sunny
 27° /14° 0 mm 1.4
26 Aug. Sunny
Sunny
 26° /15° 0.1 mm 1.1
27 Aug. Patchy rain possible
Patchy rain possible
 24° /13° 1.7 mm 0.8
28 Aug. Patchy rain possible
Patchy rain possible
 23° /11° 1.1 mm 1
29 Aug. Patchy rain possible
Patchy rain possible
 20° /12° 1.6 mm 0.6
30 Aug. Patchy rain possible
Patchy rain possible
 23° /13° 0.9 mm 4
31 Aug. Patchy rain possible
Patchy rain possible
 19° /14° 0.1 mm 4
Next
Important Notice
Our weather forecast for Boston in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Boston forecast closer to your planned date for the most up-to-date weather information.
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Boston in August - FAQ

What are the expected maximum and minimum temperatures in Boston during August?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Boston during August?
In August, Boston can expect light to moderate rainfall, totaling 30 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Boston during August?
The average wind speed in Boston during August is 26 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Boston

Explore the daily rainfall trends and prepare for Bostons August weather 💧

UV exposure in Boston during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️

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Get accurate weather forecasts for Boston, located at latitude 52.976 and longitude -0.027. Stay updated with localized weather information tailored for Boston.

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