Grants Weather in September

What's the weather like in Grants (New Mexico) in September 2025?

The climate in Grants during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Grants and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (75°F), whilst at night 7°C (44°F) is normal.

Grants weather averages (imperial / metric)
Daytime temperature	24°C 75.2°F
Nightly temperature	6.6°C 43.9°F
Average temperature	15.3°C 59.5°F
Daily sunshine	10.3 hrs
Avg rainfall	34 mm 1.3 ins
Rainy days	7 days
Sea temperature	20°C 68°F
Humidity	48%
Windspeed	14.4kph 9 mph

On average September is the 3rd wettest month of the year in Grants with around 34mm 1.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

On the flip side this corresponds to an average of 10.3 hours of sunshine per day.

September temperatures in Grants

September rainfall

September hourly sunshine

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Grants in September 2025.