ClimateForecastNovemberDecember >>

Gillette (WY) Climate by Month

The climate in Gillette is marked by big temperature swings throughout the year. Temperatures range from very warm during the warmest months to very cold in the cooler months. It typically sees modest rain/snowfall throughout the year. Now, let’s explore all the climate details to give you a full picture.

Average day and night temperature

In Gillette, temperatures differ significantly between summer and winter months. Typically, daytime temperatures range from a very warm 31°C in July to a very cold 1°C in the coolest month, December. Nights are cooler, with temperatures generally dropping to -10°C, particularly during the colder months.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Gillette typically sees modest rain/snowfall throughout the year, with an average annual precipitation of 425 mm. The climate in Gillette shows significant variation throughout the year. Expect high rainfall in May, with an average of 101 mm of precipitation over 13 rainy days. In contrast, January offers drier and sunnier days, with around 13 mm of snowfall over 7 snowy days.

The mean monthly precipitation over the year, including rain, hail and snow

The best time of year to visit Gillette in the United States of America

During the months of June and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is summer in Gillette?
    The hottest season / summer takes place in June, July, August and September.
  • Does Gillette have a dry season?
    Yes, the months of January, February, November and December are very dry.
  • When is winter in Gillette?
    The coldest season / winter is in the following months: January, February and December.
  • Which is the warmest month in Gillette?
    July has an average maximum temperature of 31°C and is the warmest month of the year.
  • Which is the coldest month in Gillette?
    The coldest month is December with an average maximum temperature of 1°C.
  • Which is the wettest month in Gillette?
    May tops the wettest month list with 101 mm of rainfall.
  • Which is the driest month in Gillette?
    January is the driest month with 13 mm of precipitation.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Gillette (WY)

    Fri   Nov 22
    11°C | -2°C
    SW 11 km/h
    partly cloudy and no rain

    partly cloudy and no rain

    Sat   Nov 23
    14°C | -3°C
    SW 32 km/h
    broken clouds and no rain

    broken clouds and no rain

    Sun   Nov 24
    0°C | -10°C
    N 22 km/h
    1 mm
    overcast and  chance of slight snow

    overcast and chance of slight snow