Weather in Gretna in August

General weather information about Gretna

Average annual temperature is 5.6 °C

Absolute maximum temperature: 36.4 °C

Absolute minimum temperature: -30.6 °C

Number of sunny days: 199 days

Number of rainy days: 112 days

Number of snow days: 54 days

Look at detailed online map of Gretna

* Weather data for Gretna Canada is based on climate observations for 2026 year

Gretna air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)-0.23.32.512.930.436.432.231.333.228.010.88.3
Average daytime temperature (°C)-7.4-6.2-4.15.523.628.125.425.723.411.93.10.1
Average temperature (°C)-10.7-12.0-9.50.616.522.019.520.217.57.2-1.1-3.7
Average night temperature (°C)-13.5-16.9-13.8-3.89.616.514.115.512.63.4-4.2-6.8
Absolute minimum temperature (°C)-27.7-30.6-22.9-16.1-0.610.59.010.05.6-10.5-13.6-17.9

Gretna monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.010.012.014.015.016.016.015.013.011.09.08.0
Daylight mean duration (h)8.810.211.913.715.316.115.714.312.610.89.28.3
Daylight minimum duration (h)8.09.010.012.014.015.015.013.011.09.08.08.0
Sunshine mean duration (h)3.07.08.27.812.112.913.410.69.26.35.25.1
Precipitation (mm)14718604391323960732520
Sunny days201720142012151316151621
Rainy days101811181618141393
Snow days101110800000357

Gretna - weather forecast by months

Gretna weather in januaryGretna weather in februaryGretna weather in marchGretna weather in aprilGretna weather in mayGretna weather in juneGretna weather in julyGretna weather in augustGretna weather in septemberGretna weather in octoberGretna weather in novemberGretna weather in december

Best time to visit Gretna:

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

  • May — 12.1(h)
  • June — 12.9(h)
  • July — 13.4(h)
  • August — 10.6(h)

Months with the longest average daylight duration in Gretna:

  • June — 16.1(h)
  • July — 15.7(h)

The largest precipitation sum in Gretna is at

  • April — 60(mm)
  • June — 91(mm)
  • September — 60(mm)
  • October — 73(mm)

    • Weather forecast in the closest to Gretna admin centers

    Weather forecast in the closest towns to Gretna

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    Frequently asked questions

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