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

September weather forecast and climate
Warren, ID

The first month of the autumn, September, is still a comfortable month in Warren, Idaho, with average temperature ranging between max 65.7°F (18.7°C) and min 32°F (0°C).

Temperature

In September, the average high-temperature decreases, from a warm 75.7°F (24.3°C) in August, to an enjoyable 65.7°F (18.7°C). In September, in Warren, the average low-temperature is 32°F (0°C).

Humidity

In Warren, Idaho, the average relative humidity is 55%.

Rainfall

In Warren, during September, the rain falls for 7.7 days and regularly aggregates up to 1.06" (27mm) of precipitation. Throughout the year, there are 81 rainfall days, and 32.68" (830mm) of precipitation is accumulated.

Snowfall

January through December are months with snowfall. In Warren, during September, snow falls for 2.9 days and regularly aggregates up to 2.32" (59mm) of snow. In Warren, during the entire year, snow falls for 160 days, and aggregates up to 210.63" (5350mm) of snow.

Daylight

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

Sunshine

The average sunshine in Warren is 8.9h.

UV index

In Warren, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 3 in September transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in September in Warren?

In September, in Warren, the average high-temperature is 65.7°F (18.7°C), and the average low-temperature is 32°F (0°C).

What is the average humidity in September in Warren?

In September, the average relative humidity in Warren is 55%.

How many days does it rain in September in Warren?

In Warren, during September, the rain falls for 7.7 days and regularly aggregates up to 1.06" (27mm) of precipitation.

How many days does it snow in September in Warren?

In Warren, during September, snow falls for 2.9 days and regularly aggregates up to 2.32" (59mm) of snow.

How many hours of daylight does Warren have in September?

The average length of the day in September in Warren is 12.5h.

How long on average sun shines in September in Warren?

The average sunshine in September is 8.9h.

How high is the UV index in September in Warren?

In Warren, Idaho, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV rays.
Average temperature in September - Warren, ID
  • Average high temperature in September: 18.7°C

Warmest months (with the highest average high temperature) are July and August (24.3°C).
The month with the lowest average high temperature is December (-3.7°C).

  • Average low temperature in September: 0°C

Months with the highest average low temperature are January, February, March, April, May, June, July, August, September, October, November and December (0°C).
Coldest months (with the lowest average low temperature) are January, February, March, April, May, June, July, August, September, October, November and December (0°C).

Average humidity in September - Warren, ID
  • Average humidity in September: 55%

The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (48%).

Average rainfall in September - Warren, ID
  • Average rainfall in September: 27mm

The wettest month (with the highest rainfall) is February (114mm).
The driest month (with the lowest rainfall) is July (13mm).

Average rainfall days in September - Warren, ID
  • Average rainfall days in September: 7.7 days

The month with the highest number of rainy days is May (15.3 days).
The month with the lowest number of rainy days is January (1.8 days).

Average snowfall in September - Warren, ID
  • Average snowfall in September: 59mm

The month with the highest snowfall is February (917mm).
The month with the lowest snowfall is August (2mm).

Average snowfall days in September - Warren, ID
  • Average snowfall days in September: 2.9 days

The month with the highest number of snowfall days is March (24.9 days).
The month with the lowest number of snowfall days is August (0.3 days).

Average daylight in September / Average sunshine in September - Warren, ID
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.6h).
The month with shortest days is December (Average daylight: 8.8h).

  • Average sunshine in September: 8.9h

The month with most sunshine is July (Average sunshine: 11.6h).
The month with least sunshine is January (Average sunshine: 3.3h).

Average UV index in September - Warren, ID
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January, February, March, April, November and December (UV index 1).