Weather in Alcatraz in August

General weather information about Alcatraz

Average annual temperature is 11.4 °C

Absolute maximum temperature: 38.4 °C

Absolute minimum temperature: -20.7 °C

Number of sunny days: 258 days

Number of rainy days: 81 days

Number of snow days: 26 days

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

Alcatraz air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)8.810.216.227.229.234.638.435.233.327.922.58.8
Average daytime temperature (°C)1.74.19.319.025.429.435.932.127.021.412.43.7
Average temperature (°C)-3.8-3.22.910.318.121.828.525.019.613.45.1-2.4
Average night temperature (°C)-8.5-8.7-2.22.110.413.219.417.712.15.7-1.3-7.3
Absolute minimum temperature (°C)-19.6-20.7-10.5-6.26.58.213.815.07.8-3.4-10.9-13.4

Alcatraz monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.014.012.011.010.09.0
Daylight mean duration (h)10.010.812.013.114.114.614.413.512.411.310.29.7
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)6.68.88.811.712.313.313.111.911.010.28.57.4
Precipitation (mm)4035604161202519103143
Sunny days171812222225312019262422
Rainy days741279501111555
Snow days767100000014

Alcatraz - weather forecast by months

Alcatraz weather in januaryAlcatraz weather in februaryAlcatraz weather in marchAlcatraz weather in aprilAlcatraz weather in mayAlcatraz weather in juneAlcatraz weather in julyAlcatraz weather in augustAlcatraz weather in septemberAlcatraz weather in octoberAlcatraz weather in novemberAlcatraz weather in december

Best time to visit Alcatraz:

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

  • June — 13.3(h)
  • July — 13.1(h)

The largest precipitation sum in Alcatraz is at

  • January — 40(mm)
  • February — 35(mm)
  • March — 60(mm)
  • December — 43(mm)

    • Weather forecast in the closest to Alcatraz admin centers

    Weather forecast in the closest towns to Alcatraz

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    Frequently asked questions

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