July weather forecastPortland, ME
July
Weather in July
July in Portland, Maine can be quite an eventful time with the weather reaching its zenith. The highest temperature spikes can be expected in July, rising from 62.2°F (16.8°C) to 72.5°F (22.5°C). The city enjoys plenty of sunshine and clear skies, making it a popular period for vacationers aiming for that perfect summer break. The seashore attracts tourists seeking a sunny retreat with the lunch packed in picnic baskets. However, hydration is key as the UV index hits its peak this month.Temperature
July is the warmest month of the year in Portland, registering average temperatures as high as 72.5°F (22.5°C) and as low as 62.2°F (16.8°C).Humidity
The months with the highest humidity are June and July, with an average relative humidity of 82%.Rainfall
In Portland, Maine, during July, the rain falls for 14.7 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, there are 127 rainfall days, and 21.93" (557mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Ocean temperature
In Portland, Maine, the average seawater temperature in July is 61.3°F (16.3°C).Note: Swimming in water at 61.3°F (16.3°C) is not a pleasing experience for the majority. As the temperature descends from 69.8°F (21°C) to 59°F (15°C), controlling breathing becomes increasingly hard.
Daylight
In Portland, Maine, the average length of the day in July is 15h and 4min.On the first day of the month, sunrise is at 5:03 am and sunset at 8:26 pm. On the last day of July, in Portland, sunrise is at 5:29 am and sunset at 8:04 pm EDT.
Sunshine
In July, the average sunshine is 10.3h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: During July, 5 as the daily maximum UV index converts into the following advice:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Portland, ME
- Average high temperature in July: 72.5°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 July: 62.2°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 July
Portland, ME
- Average pressure in July: 29.93"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 July
Portland, ME
- Average wind speed in July: 7.5mph
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 July
Portland, ME
- Average humidity in July: 82%
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 July
Portland, ME
- Average rainfall in July: 1.85"
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 July
Portland, ME
- Average rainfall days in July: 14.7 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 July
Portland, ME
- Average snowfall in July: 0"
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 July
Portland, ME
- Average snowfall days in July: 0 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 July
Portland, ME
- Average sea temperature in July: 61.3°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 July /
Average sunshine in July
Portland, ME
- Average daylight in July: 15h and 6min
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 July: 10h and 18min
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 July
Portland, ME
- Average sunshine days in July: 13.8 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 July
Portland, ME
- Average UV index in July: 5
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 July
Portland, ME
- Average cloud cover in July: 32
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 July
Portland, ME
- Average visibility in July: 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).
