Best year time to visit Dumbarton

General weather information about Dumbarton

Average annual temperature is 9.7 °C

Absolute maximum temperature: 33.1 °C

Absolute minimum temperature: -33.3 °C

Number of sunny days: 113 days

Number of rainy days: 228 days

Number of snow days: 24 days

Look at detailed online map of Dumbarton

* Weather data for Dumbarton United States is based on climate observations for 2026 year

Dumbarton air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)8.216.416.029.131.633.132.328.730.329.915.710.8
Average daytime temperature (°C)2.94.75.516.320.724.227.524.422.516.97.55.8
Average temperature (°C)-0.4-1.60.49.413.318.422.019.417.112.33.12.5
Average night temperature (°C)-3.3-6.8-4.33.76.613.417.315.312.88.8-0.20.1
Absolute minimum temperature (°C)-10.4-33.3-14.4-5.0-0.48.213.210.66.0-1.1-5.3-7.5

Dumbarton monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.410.511.913.414.715.315.013.912.511.09.79.0
Daylight minimum duration (h)9.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)2.64.75.68.211.710.311.210.19.26.05.32.8
Precipitation (mm)1349412713468154186185649274167
Sunny days66711208106151086
Rainy days191620191122212515211920
Snow days664000000035

Dumbarton - weather forecast by months

Dumbarton weather in januaryDumbarton weather in februaryDumbarton weather in marchDumbarton weather in aprilDumbarton weather in mayDumbarton weather in juneDumbarton weather in julyDumbarton weather in augustDumbarton weather in septemberDumbarton weather in octoberDumbarton weather in novemberDumbarton weather in december

Best time to visit Dumbarton:

The best time to visit Dumbarton during the most sunny months:

  • May — 11.7(h)
  • June — 10.3(h)
  • July — 11.2(h)
  • August — 10.1(h)
  • September — 9.2(h)

Months with the longest average daylight duration in Dumbarton:

  • June — 15.3(h)

The largest precipitation sum in Dumbarton is at

  • July — 186(mm)
  • August — 185(mm)
  • December — 167(mm)

    • Weather forecast in the closest to Dumbarton admin centers

    Weather forecast in the closest towns to Dumbarton

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    Frequently asked questions

    When is the best time to visit Dumbarton?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Dumbarton.
    What is the weather like in Dumbarton?
    See average temperature, rainfall and daylight hours for Dumbarton by month in the table above.
    How many sunny days does Dumbarton have?
    The monthly weather statistics above show sunshine and rainfall patterns for Dumbarton throughout the year.