Best year time to visit Sister Island

General weather information about Sister Island

Average annual temperature is 27.8 °C

Absolute maximum temperature: 31.8 °C

Absolute minimum temperature: 21.1 °C

Number of sunny days: 81 days

Number of rainy days: 284 days

Look at detailed online map of Sister Island

* Weather data for Sister Island Cayman Islands is based on climate observations for 2026 year

Sister Island air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)27.527.227.228.630.130.230.831.831.631.429.528.8
Average daytime temperature (°C)26.626.626.727.628.729.430.430.730.530.028.727.6
Average temperature (°C)25.925.925.926.927.628.629.629.729.429.027.926.6
Average night temperature (°C)25.125.124.925.926.127.428.428.328.227.927.025.8
Absolute minimum temperature (°C)21.124.022.723.623.324.525.526.525.425.724.722.7

Sister Island monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)11.011.012.012.013.013.013.013.012.011.011.011.0
Daylight mean duration (h)11.111.512.012.613.113.313.212.812.311.711.211.0
Daylight minimum duration (h)10.011.011.012.012.013.013.012.011.011.011.010.0
Sunshine mean duration (h)10.310.810.811.511.011.012.111.110.59.99.58.1
Precipitation (mm)2516463512420058977913087102
Sunny days11108866761756
Rainy days201823222524242529242525
Snow days000000000000

Sister Island - weather forecast by months

Sister Island weather in januarySister Island weather in februarySister Island weather in marchSister Island weather in aprilSister Island weather in maySister Island weather in juneSister Island weather in julySister Island weather in augustSister Island weather in septemberSister Island weather in octoberSister Island weather in novemberSister Island weather in december

Best time to visit Sister Island:

The largest precipitation sum in Sister Island is at

  • May — 124(mm)
  • June — 200(mm)
  • October — 130(mm)

    • Weather forecast in the closest to Sister Island admin centers

    Weather forecast in the closest towns to Sister Island

    Explore Sister Island

    See also
    MapTrains schedule
    Plan your trip
    AccommodationExperiencesBlog

    Frequently asked questions

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