April weather forecastCathan, WA
April
Weather in April
April in Cathan, Washington, is a fresh spring month, with temperature in the range of an average low of 39.4°F (4.1°C) and an average high of 53.6°F (12°C).Temperature
As March transitions into April, Cathan records an average high-temperature of a cool 53.6°F (12°C), showing a gentle shift from the preceding month. The average temperature during April nights dips to a wintry 39.4°F (4.1°C).Humidity
In Cathan, the average relative humidity in April is 81%.Rainfall
In Cathan, in April, during 19 rainfall days, 2.95" (75mm) of precipitation is typically accumulated. Throughout the year, there are 188.6 rainfall days, and 34.92" (887mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. April is the last month it regularly snows. During 0.2 snowfall days, in April, Cathan aggregates 0.12" (3mm) of snow. Throughout the year, there are 11.6 snowfall days, and 9.61" (244mm) of snow is accumulated.Daylight
The average length of the day in April is 13h and 43min.On the first day of April, sunrise is at 6:45 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 8:21 pm PDT.
Sunshine
In Cathan, Washington, the average sunshine in April is 7.9h.UV index
In April, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 3 in April translates into the following instructions:
Prioritize safety - Recommendations to avert sunburn are shared. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Experience reduced UV exposure by about half when donning a wide-brim hat. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Cathan, WA
- Average high temperature in April: 53.6°F
The warmest month (with the highest average high temperature) is August (72.3°F).
The month with the lowest average high temperature is December (41.7°F).
- Average low temperature in April: 39.4°F
The month with the highest average low temperature is August (51.6°F).
The coldest month (with the lowest average low temperature) is February (33.8°F).
Average pressure in April
Cathan, WA
- Average pressure in April: 30.04"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in April
Cathan, WA
- Average wind speed in April: 4.7mph
The windiest months (with the highest average wind speed) are January and November (5.6mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in April
Cathan, WA
- Average humidity in April: 81%
The months with the highest relative humidity are January, February, November and December (85%).
The month with the lowest relative humidity is July (73%).
Average rainfall in April
Cathan, WA
- Average rainfall in April: 2.95"
The wettest month (with the highest rainfall) is November (4.92").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in April
Cathan, WA
- Average rainfall days in April: 19 days
The month with the highest number of rainy days is March (20.9 days).
The month with the least rainy days is August (6.9 days).
Average snowfall in April
Cathan, WA
- Average snowfall in April: 0.12"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Cathan, WA
- Average snowfall days in April: 0.2 days
The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Cathan, WA
- Average daylight in April: 13h and 42min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in April: 7h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in April
Cathan, WA
- Average sunshine days in April: 8.4 days
The month with the most sunshine days is August (22 days).
The month with the least sunshine days is March (8.1 days).
Average UV index in April
Cathan, WA
- Average UV index in April: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in April
Cathan, WA
- Average cloud cover in April: 51
The month with the most cloud cover is December (Cloud cover 57).
The months with the least cloud cover are July and August (Cloud cover 26).
Average visibility in April
Cathan, WA
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, November and December (5mi).
