Weather in Derry in September

General weather information about Derry

Average annual temperature is 21.1 °C

Absolute maximum temperature: 42.1 °C

Absolute minimum temperature: -0.7 °C

Number of sunny days: 194 days

Number of rainy days: 171 days

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

Derry air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)25.227.528.730.032.140.139.742.139.234.729.725.3
Average daytime temperature (°C)18.120.023.024.029.334.736.739.333.928.020.017.5
Average temperature (°C)13.014.117.018.523.528.130.332.727.821.614.611.9
Average night temperature (°C)9.19.712.814.018.722.925.426.822.416.810.67.7
Absolute minimum temperature (°C)0.1-0.7-0.58.311.018.522.522.418.17.22.40.9

Derry 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)10.411.112.013.013.814.214.013.312.411.410.610.1
Daylight minimum duration (h)10.010.011.012.013.014.013.012.011.010.010.010.0
Sunshine mean duration (h)6.87.68.18.210.411.311.912.110.98.86.77.8
Precipitation (mm)208906823013978551449248985
Sunny days12101491511172416242022
Rainy days191817211619147147109
Snow days000000000000

Derry - weather forecast by months

Derry weather in januaryDerry weather in februaryDerry weather in marchDerry weather in aprilDerry weather in mayDerry weather in juneDerry weather in julyDerry weather in augustDerry weather in septemberDerry weather in octoberDerry weather in novemberDerry weather in december

Best time to visit Derry:

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

  • July — 11.9(h)
  • August — 12.1(h)

The largest precipitation sum in Derry is at

  • January — 208(mm)
  • April — 230(mm)
  • May — 139(mm)

    • Weather forecast in the closest to Derry admin centers

    Weather forecast in the closest towns to Derry

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    Frequently asked questions

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