April weather forecast
Thermopolis, WY

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Weather in April

Thermopolis in April is a time of further warming and resurgent plant life. The increased average high temperature of 52.9°F (11.6°C) is a clear departure from the cold of the prior months. Rain is more common with April getting 1.34" (34mm) of rainfall over 13.4 days, marking a shift from snowy to rainy conditions. As days grow longer and nights become warmer, the city slowly sheds its winter coat, brightening up with lively spring colors. The mix of sunny and rainy moments gives April a well-rounded spring feel, as one can observe an infusion of fresh green hues in the landscape.

Temperature

With the onset of April, Thermopolis's average high-temperature experiences a slight rise, moving from March's chilly 44.1°F (6.7°C) to a cool 52.9°F (11.6°C). During the nights in April, an average low-temperature of 33.8°F (1°C) is observed in Thermopolis.

Humidity

In Thermopolis, the average relative humidity in April is 56%.

Rainfall

In Thermopolis, during April, the rain falls for 13.4 days and regularly aggregates up to 1.34" (34mm) of precipitation. Throughout the year, in Thermopolis, there are 117.2 rainfall days, and 11.14" (283mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, September through December. In Thermopolis, in April, during 5.1 snowfall days, 2.76" (70mm) of snow is typically accumulated. Throughout the year, there are 51.2 snowfall days, and 21.3" (541mm) of snow is accumulated.

Daylight

The average length of the day in April in Thermopolis is 13h and 28min.
On the first day of the month, sunrise is at 6:52 am and sunset at 7:40 pm. On the last day of April, in Thermopolis, sunrise is at 6:05 am and sunset at 8:14 pm MDT.

Sunshine

The average sunshine in April is 10.3h.

UV index

January through April, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Thermopolis. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index, 2 in April, converts into the following recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Thermopolis in April?

The high-temperature during April is 52.9°F (11.6°C) and the low-temperature is 33.8°F (1°C).

What is the average humidity in April in Thermopolis?

In Thermopolis, Wyoming, the average relative humidity in April is 56%.

How much does it rain in Thermopolis in April?

In Thermopolis, Wyoming, during April, the rain falls for 13.4 days and regularly aggregates up to 1.34" (34mm) of precipitation.

How much does it snow in Thermopolis in April?

In Thermopolis, during April, snow falls for 5.1 days and regularly aggregates up to 2.76" (70mm) of snow.

How many hours of daylight does Thermopolis have in April?

The average day length in April is 13h and 28min.

What time are sunrise and sunset in April in Thermopolis?

In April, on the first day of the month, sunrise is at 6:52 am and sunset at 7:40 pm. On the last day of the month, in Thermopolis, Wyoming, sunrise is at 6:05 am and sunset at 8:14 pm MDT.

How many hours of sunshine does Thermopolis have in April?

In April, the average sunshine duration is 10.3h.

When is the lowest UV index in Thermopolis?

January through April, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Thermopolis, Wyoming.

What is the UV index intensity in April in Thermopolis?

In April, the average daily maximum UV index in Thermopolis, Wyoming, is 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Thermopolis, WY

Average temperature in April - Thermopolis, WY
  • Average high temperature in April: 52.9°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is December (28.2°F).

  • Average low temperature in April: 33.8°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).

Average pressure in April
Thermopolis, WY

Average pressure in April - Thermopolis, WY
  • Average pressure in April: 29.93"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in April
Thermopolis, WY

Average wind speed in April - Thermopolis, WY
  • Average wind speed in April: 7.1mph

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is January (5mph).

Average humidity in April
Thermopolis, WY

Average humidity in April - Thermopolis, WY
  • Average humidity in April: 56%

The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (35%).

Average rainfall in April
Thermopolis, WY

Average rainfall in April - Thermopolis, WY
  • Average rainfall in April: 1.34"

The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is January (0.43").

Average rainfall days in April
Thermopolis, WY

Average rainfall days in April - Thermopolis, WY
  • Average rainfall days in April: 13.4 days

The month with the highest number of rainy days is May (17 days).
The months with the least rainy days are January and December (4.3 days).

Average snowfall in April
Thermopolis, WY

Average snowfall in April - Thermopolis, WY
  • Average snowfall in April: 2.76"

The month with the highest snowfall is February (4.57").
The months with the least snowfall are June, July and August (0").

Average snowfall days in April
Thermopolis, WY

Average snowfall days in April - Thermopolis, WY
  • Average snowfall days in April: 5.1 days

The month with the highest number of snowfall days is February (11.1 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in April /
Average sunshine in April
Thermopolis, WY

Average daylight in April / Average sunshine in April - Thermopolis, WY
  • Average daylight in April: 13h and 3min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in April: 10h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).

Average sunshine days in April
Thermopolis, WY

Average sunshine days in April - Thermopolis, WY
  • Average sunshine days in April: 10.8 days

The month with the most sunshine days is January (20.2 days).
The month with the least sunshine days is May (10.1 days).

Average UV index in April
Thermopolis, WY

Average UV index in April - Thermopolis, WY
  • Average UV index in April: 2

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

Average cloud cover in April
Thermopolis, WY

Average cloud cover in April - Thermopolis, WY
  • Average cloud cover in April: 32

The month with the most cloud cover is February (Cloud cover 35).
The months with the least cloud cover are July and August (Cloud cover 14).

Average visibility in April
Thermopolis, WY

Average visibility in April - Thermopolis, WY
  • Average visibility in April: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

Thermopolis, Wyoming, USA

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