Climate Insights for Fort Defiance

The climate in Fort Defiance is temperate. The average annual temperature is 10°C and approximately 356mm of precipitation falls per year. July is the wettest month, receiving around 45mm of rainfall. Fort Defiance is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, December, February, when temperatures can drop to -6°C. Snowfall occurs from January to December, with around 88cm accumulating over the season.

Temperatures in Fort Defiance vary considerably across the year, with a 35°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 29°C and the mean temperature sits around 23°C. The coldest month is January, when overnight lows fall to -6°C and the daily average is -2°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between May and June, with a 7°C shift in average temperatures.

Fort Defiance is a quite dry location, receiving approximately 356mm of precipitation annually, which averages out to around 30mm per month. The wettest month is July, averaging 45mm of rainfall. March and January also tend to see above-average precipitation. The driest month is June, with just 13mm. That's 32mm less than July, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 88cm accumulating over the season. January typically sees the most snow at around 24cm.

Fort Defiance is moderately windy, with an average annual wind speed of 21km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 27km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in January, with average winds dropping to 17km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 10km/h gap between the calmest and windiest months.

It is currently spring in Fort Defiance, which began on March 20, 2026. Fort Defiance is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 29°C, while the coldest stretch bottoms out in January near -6°C. Summer is next, beginning on June 21, 2026 — 85 days from now.

The best time to visit Fort Defiance is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 30mm per month. By contrast, January can be quite cold with temperatures dropping to -6°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Fort Defiance based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.