Best year time to visit Gwinnett County

General weather information about Gwinnett County

Average annual temperature is 16.6 °C

Absolute maximum temperature: 36.4 °C

Absolute minimum temperature: -4.9 °C

Number of sunny days: 176 days

Number of rainy days: 189 days

Look at detailed online map of Gwinnett County

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

Gwinnett County air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)19.424.124.726.930.232.035.736.432.528.025.418.9
Average daytime temperature (°C)13.616.817.821.024.328.332.531.627.622.717.213.2
Average temperature (°C)8.511.412.015.218.922.626.325.821.917.011.48.0
Average night temperature (°C)4.47.36.810.314.317.621.121.116.912.27.03.8
Absolute minimum temperature (°C)-4.8-3.4-4.93.36.113.918.616.812.55.8-3.5-3.5

Gwinnett County monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.013.012.011.010.010.0
Daylight mean duration (h)10.211.012.013.013.914.414.213.412.411.310.49.9
Daylight minimum duration (h)9.010.011.012.013.014.013.012.011.010.010.09.0
Sunshine mean duration (h)5.66.28.39.19.910.911.810.510.18.86.96.4
Precipitation (mm)13912214514611710578160883567100
Sunny days131118131212101016212020
Rainy days181713171918212114101011
Snow days000000000000

Gwinnett County - weather forecast by months

Gwinnett County weather in januaryGwinnett County weather in februaryGwinnett County weather in marchGwinnett County weather in aprilGwinnett County weather in mayGwinnett County weather in juneGwinnett County weather in julyGwinnett County weather in augustGwinnett County weather in septemberGwinnett County weather in octoberGwinnett County weather in novemberGwinnett County weather in december

Best time to visit Gwinnett County:

The best time to visit Gwinnett County during the most sunny months:

  • June — 10.9(h)
  • July — 11.8(h)

The largest precipitation sum in Gwinnett County is at

  • January — 139(mm)
  • March — 145(mm)
  • April — 146(mm)
  • August — 160(mm)

    • Weather forecast in the closest to Gwinnett County admin centers

    Weather forecast in the closest towns to Gwinnett County

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    Frequently asked questions

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