Weather in Johnstown in May

General weather information about Johnstown

Average annual temperature is 11.2 °C

Absolute maximum temperature: 25.8 °C

Absolute minimum temperature: -2.7 °C

Number of sunny days: 98 days

Number of rainy days: 267 days

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* Weather data for Johnstown Ireland is based on climate observations for 2026 year

Johnstown air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)13.114.014.717.219.225.421.922.725.821.513.913.5
Average daytime temperature (°C)8.710.110.012.216.219.518.418.718.614.610.49.8
Average temperature (°C)6.47.77.39.012.716.315.215.715.512.08.27.9
Average night temperature (°C)4.35.35.05.99.413.012.113.012.19.35.75.7
Absolute minimum temperature (°C)-2.70.1-0.62.35.99.48.79.75.02.40.2-1.7

Johnstown monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)8.010.012.014.016.016.016.015.013.011.09.07.0
Daylight mean duration (h)8.29.911.914.015.816.816.314.712.710.68.77.7
Daylight minimum duration (h)7.09.010.012.014.016.015.013.011.09.08.07.0
Sunshine mean duration (h)3.84.14.48.411.411.39.48.27.65.04.62.6
Precipitation (mm)6814156112507214012017720369126
Sunny days12122518121387135
Rainy days191629251318302822241726
Snow days000000000000

Johnstown - weather forecast by months

Johnstown weather in januaryJohnstown weather in februaryJohnstown weather in marchJohnstown weather in aprilJohnstown weather in mayJohnstown weather in juneJohnstown weather in julyJohnstown weather in augustJohnstown weather in septemberJohnstown weather in octoberJohnstown weather in novemberJohnstown weather in december

Best time to visit Johnstown:

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

  • April — 8.4(h)
  • May — 11.4(h)
  • June — 11.3(h)
  • July — 9.4(h)

Months with the longest average daylight duration in Johnstown:

  • May — 15.8(h)
  • June — 16.8(h)
  • July — 16.3(h)

The largest precipitation sum in Johnstown is at

  • March — 156(mm)
  • July — 140(mm)
  • September — 177(mm)
  • October — 203(mm)

    • Weather forecast in the closest to Johnstown admin centers

    Weather forecast in the closest towns to Johnstown

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    Frequently asked questions

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