Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average sea temperature in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
An increase in the average high-temperature marks April, moving from March's cold 37°F (2.8°C) to a frosty 48.9°F (9.4°C). Castine witnesses an average low-temperature of 34.5°F (1.4°C) throughout the month of April.Humidity
In Castine, Maine, the average relative humidity in April is 78%.Rainfall
In Castine, in April, during 15 rainfall days, 2.64" (67mm) of precipitation is typically accumulated. Throughout the year, there are 141.1 rainfall days, and 24.29" (617mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Castine, Maine. In Castine, in April, snow falls for 2.9 days, with typically accumulated 2.17" (55mm) of snow. Throughout the year, there are 44.3 snowfall days, and 16.81" (427mm) of snow is accumulated.Ocean temperature
In Castine, the average seawater temperature in April is 40.6°F (4.8°C).Note: In relation to swimming, this scenario is excessively cold, perilous, and a direct threat to life. Hypothermia strikes rapidly in the absence of insulated waterproof gear.
Daylight
In April, the average length of the day is 13h and 30min.On the first day of April, sunrise is at 6:14 am and sunset at 7:02 pm. On the last day of the month, sunrise is at 5:26 am and sunset at 7:38 pm EDT.
Sunshine
The average sunshine in April is 7.1h.UV index
In April, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A typical high UV index of 3 in April suggests the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. Around midday, solar radiation is most harmful; hence, exposure should be limited. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Castine in April?
What is the average humidity in April?
How many days does it rain in April?
How much does it snow in April?
What is the ocean temperature in April?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How long on average sun shines in April?
What is the UV index reading in April?
Average temperature in April
Castine, ME
- Average high temperature in April: 48.9°F
The warmest months (with the highest average high temperature) are July and August (73.9°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in April: 34.5°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in April
Castine, ME
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Castine, ME
- Average wind speed in April: 9.1mph
The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in April
Castine, ME
- Average humidity in April: 78%
The months with the highest relative humidity are February and July (83%).
The month with the lowest relative humidity is November (77%).
Average rainfall in April
Castine, ME
- Average rainfall in April: 2.64"
The wettest month (with the highest rainfall) is December (2.72").
The driest months (with the least rainfall) are July and September (1.46").
Average rainfall days in April
Castine, ME
- Average rainfall days in April: 15 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in April
Castine, ME
- Average snowfall in April: 2.17"
The month with the highest snowfall is January (4.57").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Castine, ME
- Average snowfall days in April: 2.9 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in April
Castine, ME
- Average sea temperature in April: 40.6°F
The best month for swimming (with the highest average sea temperature) is August (58.6°F).
The coldest month (with the lowest average sea temperature) is March (38.2°F).
Average daylight in April /
Average sunshine in April
Castine, ME
- Average daylight in April: 13h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in April: 7h and 1min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in April
Castine, ME
- Average sunshine days in April: 11.7 days
The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is April (11.7 days).
Average UV index in April
Castine, ME
- Average UV index in April: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in April
Castine, ME
- Average cloud cover in April: 54
The month with the most cloud cover is March (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 37).
Average visibility in April
Castine, ME
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, October, November and December (6mi).
The months with the lowest visibility are May, June, July, August and September (5mi).
Castine, Maine, USA
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