Jackson (NH) Temperature by Month

The average annual maximum temperature in Jackson, New Hampshire, United States of America is 12°C (54°F), with daytime highs ranging from -2°C (28°F) in January to 26°C (79°F) in July. This page covers monthly averages, day-night differences, and how Jackson compares to cities worldwide.

In Jackson, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping from 13°C (55°F) in July to -14°C (7°F) in January.

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

Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating.

The chart below shows the average temperature throughout the year:

Jackson'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:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.

New York City, USA averages 17°C (63°F) a year, with hot humid summers and cold winters that bring regular snowfall.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

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 Jackson this rarely lasts long on the ground.

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