September weather forecast and climate
Walnut, KS

September, the first month of the autumn, in Walnut, is also a moderately hot month, with average temperature ranging between max 78.8°F (26°C) and min 60.8°F (16°C).

Temperature

In Walnut, the average high-temperature in September marginally drops, from a tropical 86.5°F (30.3°C) in August, to a warm 78.8°F (26°C). In September, in Walnut, the average low-temperature is 60.8°F (16°C).

Humidity

In September, the average relative humidity in Walnut is 76%.

Rainfall

In Walnut, during September, the rain falls for 13.2 days and regularly aggregates up to 2.76" (70mm) of precipitation. In Walnut, during the entire year, the rain falls for 138.5 days and collects up to 32.17" (817mm) of precipitation.

Snowfall

In Walnut snow does not fall in June through September.

Daylight

In September, the average length of the day is 12.4h.

Sunshine

The average sunshine in September is 9h.

UV index

The average daily maximum UV index in Walnut is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. 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.

What is the temperature in September in Walnut?

In September, in Walnut, the average high-temperature is 78.8°F (26°C), and the average low-temperature is 60.8°F (16°C).

What is the average humidity in September in Walnut?

In Walnut, Kansas, the average relative humidity in September is 76%.

How many days does it rain in September in Walnut?

In September, in Walnut, Kansas, the rain falls for 13.2 days. Throughout September, 2.76" (70mm) of precipitation is accumulated.

Does it snow in Walnut in September?

In Walnut, Kansas, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Walnut?

In Walnut snow does not fall in June through September.

What is the average length of the day in September in Walnut?

In Walnut, Kansas, the average length of the day in September is 12.4h.

How many hours of sunshine does Walnut have in September?

In September, the average sunshine in Walnut is 9h.

What is the UV index intensity in September in Walnut?

The average daily maximum UV index in September in Walnut is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.
Average temperature in September - Walnut, KS
  • Average high temperature in September: 78.8°F

The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (41.5°F).

  • Average low temperature in September: 60.8°F

The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).

Average pressure in September - Walnut, KS
  • Average pressure in September: 30.01"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.91").

Average wind speed in September - Walnut, KS
  • Average wind speed in September: 7.8mph

The windiest month (with the highest average wind speed) is March (11.2mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).

Average humidity in September - Walnut, KS
  • Average humidity in September: 76%

The month with the highest relative humidity is May (80%).
Months with the lowest relative humidity are October and November (71%).

Average rainfall in September - Walnut, KS
  • Average rainfall in September: 2.76"

The wettest month (with the highest rainfall) is May (5.71").
The driest month (with the least rainfall) is January (1.22").

Average rainfall days in September - Walnut, KS
  • Average rainfall days in September: 13.2 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (5.8 days).

Average snowfall in September - Walnut, KS
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.44").
Months with the least snowfall are June, July, August and September (0").

Average snowfall days in September - Walnut, KS
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (4.1 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Walnut, KS
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in September: 9h

Months with the most sunshine are June and July (Average sunshine: 10.6h).
The month with the least sunshine is January (Average sunshine: 5.4h).

Average sunshine days in September - Walnut, KS
  • Average sunshine days in September: 15 days

The month with the most sunshine days is December (21.9 days).
The month with the least sunshine days is May (12.1 days).

Average UV index in September - Walnut, KS
  • Average UV index in September: 5

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September - Walnut, KS
  • Average cloud cover in September: 29

The month with the most cloud cover is March (Cloud cover 46).
Months with the least cloud cover are June and July (Cloud cover 25).

Average visibility in September - Walnut, KS
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).