Best year time to visit St Johnston

General weather information about St Johnston

Average annual temperature is 10.3 °C

Absolute maximum temperature: 26.4 °C

Absolute minimum temperature: -3.7 °C

Number of sunny days: 67 days

Number of rainy days: 297 days

Number of snow days: 1 day

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

St Johnston air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)12.113.414.717.620.925.522.422.826.419.712.912.2
Average daytime temperature (°C)7.59.69.512.515.821.217.117.817.913.79.28.5
Average temperature (°C)5.47.26.18.811.816.614.314.814.311.16.76.6
Average night temperature (°C)3.14.33.15.07.612.011.411.911.08.64.14.8
Absolute minimum temperature (°C)-3.7-1.1-3.6-0.14.06.88.87.16.01.6-2.2-3.7

St Johnston monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)8.010.012.015.016.017.017.015.013.011.09.07.0
Daylight mean duration (h)7.99.711.914.116.117.316.714.912.710.58.47.3
Daylight minimum duration (h)7.08.010.013.015.016.015.013.011.09.07.07.0
Sunshine mean duration (h)2.53.04.67.58.111.78.68.76.74.53.91.7
Precipitation (mm)93521201076310517611512810194170
Sunny days77681010024472
Rainy days232125222120312926272329
Snow days100000000000

St Johnston - weather forecast by months

St Johnston weather in januarySt Johnston weather in februarySt Johnston weather in marchSt Johnston weather in aprilSt Johnston weather in maySt Johnston weather in juneSt Johnston weather in julySt Johnston weather in augustSt Johnston weather in septemberSt Johnston weather in octoberSt Johnston weather in novemberSt Johnston weather in december

Best time to visit St Johnston:

The best time to visit St Johnston during the most sunny months:

  • May — 8.1(h)
  • June — 11.7(h)
  • July — 8.6(h)
  • August — 8.7(h)

Months with the longest average daylight duration in St Johnston:

  • May — 16.1(h)
  • June — 17.3(h)
  • July — 16.7(h)

The largest precipitation sum in St Johnston is at

  • July — 176(mm)
  • December — 170(mm)

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    Frequently asked questions

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