April weather forecast and climate
Simpson, MT

April is a cool spring month in Simpson, Montana, with average temperature ranging between min 36.3°F (2.4°C) and max 53.2°F (11.8°C).

Temperature

In Simpson, the average high-temperature increases, from a wintry 39.7°F (4.3°C) in March, to a fresh 53.2°F (11.8°C). The average low-temperature, in Simpson, is 36.3°F (2.4°C).

Humidity

In April, the average relative humidity is 59%.

Rainfall

In Simpson, it is raining for 11.3 days, with typically 0.71" (18mm) of accumulated precipitation. Throughout the year, in Simpson, there are 98.7 rainfall days, and 8.23" (209mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall. In Simpson, Montana, snow falls for 4.5 days, with typically accumulated 1.46" (37mm) of snow. In Simpson, during the entire year, snow falls for 53.5 days, and aggregates up to 14.25" (362mm) of snow.

Daylight

The average length of the day in Simpson is 13.8h.

Sunshine

The average sunshine in Simpson is 9.5h.

UV index

The average daily maximum UV index in Simpson is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 3 in April transform into the following instructions:
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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in April in Simpson?

In Simpson, in April, the average high-temperature is 53.2°F (11.8°C), and the average low-temperature is 36.3°F (2.4°C).

What is the average humidity in April in Simpson?

The average relative humidity in April is 59%.

How many days does it rain in April in Simpson?

In Simpson, in April, during 11.3 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

How much does it snow in Simpson in April?

In Simpson, Montana, during April, snow falls for 4.5 days and regularly aggregates up to 1.46" (37mm) of snow.

What is the average length of the day in April in Simpson?

In April, the average length of the day in Simpson is 13.8h.

How long on average sun shines in April in Simpson?

In April, the average sunshine in Simpson, Montana, is 9.5h.

What is the UV index reading in April in Simpson?

The average daily maximum UV index in April in Simpson, Montana, is 3. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to the UV radiation.
Average temperature in April - Simpson, MT
  • Average high temperature in April: 53.2°F

The warmest month (with the highest average high temperature) is July (82.8°F).
Months with the lowest average high temperature are January and December (27.1°F).

  • Average low temperature in April: 36.3°F

The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is February (13.5°F).

Average pressure in April - Simpson, MT
  • Average pressure in April: 29.92"

Months with the highest atmospheric pressure are January and February (30.12").
The month with the lowest atmospheric pressure is June (29.84").

Average wind speed in April - Simpson, MT
  • Average wind speed in April: 10.6mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).

Average humidity in April - Simpson, MT
  • Average humidity in April: 59%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (40%).

Average rainfall in April - Simpson, MT
  • Average rainfall in April: 0.71"

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is December (0.31").

Average rainfall days in April - Simpson, MT
  • Average rainfall days in April: 11.3 days

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is February (4 days).

Average snowfall in April - Simpson, MT
  • Average snowfall in April: 1.46"

The month with the highest snowfall is February (2.72").
Months with the least snowfall are June, July and August (0").

Average snowfall days in April - Simpson, MT
  • Average snowfall days in April: 4.5 days

The month with the highest number of snowfall days is February (11 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in April / Average sunshine in April - Simpson, MT
  • Average daylight in April: 13.8h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

  • Average sunshine in April: 9.5h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is February (Average sunshine: 5.3h).

Average sunshine days in April - Simpson, MT
  • Average sunshine days in April: 12.8 days

The month with the most sunshine days is September (20.3 days).
The month with the least sunshine days is April (12.8 days).

Average UV index in April - Simpson, MT
  • Average UV index in April: 3

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, March, October, November and December (UV index 2).

Average cloud cover in April - Simpson, MT
  • Average cloud cover in April: 39

The month with the most cloud cover is February (Cloud cover 46).
Months with the least cloud cover are July and August (Cloud cover 16).

Average visibility in April - Simpson, MT
  • Average visibility in April: 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).