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
In Portland, the average high-temperature in April increases from an icy 38.3°F (3.5°C) in March to a frosty 47.8°F (8.8°C). In April, the temperature in Portland drops to an average of 38.1°F (3.4°C) at night.Humidity
In Portland, the average relative humidity in April is 77%.Rainfall
In Portland, during April, the rain falls for 13.2 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Portland, during the entire year, the rain falls for 127 days and collects up to 21.93" (557mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows in Portland. During 1.6 snowfall days, in April, Portland aggregates 0.67" (17mm) of snow. Throughout the year, there are 29.7 snowfall days, and 11.73" (298mm) of snow is accumulated.Ocean temperature
In Portland, the average seawater temperature in April is 41.5°F (5.3°C).Note: In 41.5°F (5.3°C), cold shock and rapid breathing can occur when swimming at temperatures below 50°F (10°C).
Daylight
In Portland, Maine, the average length of the day in April is 13h and 28min.On the first day of April in Portland, sunrise is at 6:21 am and sunset at 7:08 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 7:42 pm EDT.
Sunshine
In April, the average sunshine is 8.1h.UV index
The average daily maximum UV index in April in Portland 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: The maximum daily UV index of 3 in April converts into the following recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures in Portland?
What is the average humidity in April in Portland?
How many days does it rain in April in Portland?
What is the last month it snows in Portland?
What is the ocean temperature in April in Portland?
What is the average length of the day in April in Portland?
What time are sunrise and sunset in April in Portland?
How long on average sun shines in April in Portland?
How high is the UV index in April in Portland?
Average temperature in April
Portland, ME
- Average high temperature in April: 47.8°F
The warmest month (with the highest average high temperature) is July (72.5°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in April: 38.1°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in April
Portland, ME
- Average pressure in April: 29.96"Hg
The months with the highest atmospheric pressure are September and November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Portland, ME
- Average wind speed in April: 10.4mph
The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest months (with the lowest average wind speed) are July and August (7.5mph).
Average humidity in April
Portland, ME
- Average humidity in April: 77%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (74%).
Average rainfall in April
Portland, ME
- Average rainfall in April: 2.05"
The wettest month (with the highest rainfall) is October (2.36").
The driest month (with the least rainfall) is September (1.18").
Average rainfall days in April
Portland, ME
- Average rainfall days in April: 13.2 days
The month with the highest number of rainy days is July (14.7 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in April
Portland, ME
- Average snowfall in April: 0.67"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in April
Portland, ME
- Average snowfall days in April: 1.6 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in April
Portland, ME
- Average sea temperature in April: 41.6°F
The best month for swimming (with the highest average sea temperature) is August (63.7°F).
The coldest month (with the lowest average sea temperature) is March (38°F).
Average daylight in April /
Average sunshine in April
Portland, ME
- 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: 8h and 1min
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 48min).
Average sunshine days in April
Portland, ME
- Average sunshine days in April: 14.3 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (13.8 days).
Average UV index in April
Portland, 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
Portland, ME
- Average cloud cover in April: 47
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in April
Portland, ME
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Portland, Maine, USA
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