Island Park (ID) Temperature by Month

The average annual maximum temperature in Island Park, Idaho, United States of America is 12°C (54°F), with daytime highs ranging from -2°C (28°F) in December to 27°C (81°F) in July. This page covers monthly averages, day-night differences, and how Island Park compares to cities worldwide.

In Island Park, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping from 7°C (45°F) in July to -15°C (5°F) in December.

The chart below illustrates the average maximum day and minimum night temperatures in Island Park by month:

Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM.

The chart below shows the average temperature throughout the year:

Island Park's average annual maximum temperature is 12°C (54°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.

Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Island Park this rarely lasts long on the ground.

For more on Island Park's weather, including monthly rainfall, sunshine hours, and humidity, visit our Island Park climate page.