Caldwell
Idaho, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Caldwell, ID

A small, calm river flows via a scenic nature park full of trees in the city of Caldwell, Idaho, on a hot and sunny day with a clear sky
A small, calm river flows via a scenic nature park full of trees in the city of Caldwell, Idaho, on a hot and sunny day with a clear sky
The first month of the autumn, September, is also a moderately hot month in Caldwell, Idaho, with temperature in the range of an average low of 45.9°F (7.7°C) and an average high of 80.8°F (27.1°C).

Temperature

In Caldwell, the average high-temperature decreases, from a hot 91.8°F (33.2°C) in August, to a warm 80.8°F (27.1°C). In Caldwell, the average low-temperature is 45.9°F (7.7°C).

Rainfall

During September, Caldwell regularly aggregates up to 0.6" (15mm) of precipitation. Throughout the year, 11.4" (289.6mm) of rain is accumulated.

Daylight

In September, the average length of the day in Caldwell is 12.5h.

What is the temperature in September in Caldwell?

In Caldwell, Idaho, in September, the average high-temperature is 80.8°F (27.1°C), and the average low-temperature is 45.9°F (7.7°C).

How much does it rain in Caldwell in September?

In Caldwell, in September, 0.6" (15mm) of precipitation is typically accumulated.

How many hours of daylight does Caldwell have in September?

In September, the average length of the day is 12.5h.
Average temperature in September - Caldwell, ID
  • Average high temperature in September: 80.8°F

The warmest month (with the highest average high temperature) is July (92.6°F).
The month with the lowest average high temperature is January (37.1°F).

  • Average low temperature in September: 45.8°F

The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (21.1°F).

Average rainfall in September - Caldwell, ID
  • Average rainfall in September: 0.6"

The wettest month (with the highest rainfall) is January (1.6").
The driest month (with the lowest rainfall) is July (0.3").

Average daylight in September - Caldwell, ID
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).