Our verdict
The best time to visit Portland, ME is November
During the warmer months, temperatures in Portland, ME can rise to a maximum of 24℃ (76℉). In the winter, temperatures can get down to -10℃ (14℉) around January.
The days are longest in Portland, ME in August, so if you want to see the sights during the day when the sun is up for the longest time, it’s best to visit around that time of year. The wet season in Portland, ME falls around October, so if you prefer the dryer weather, you should look to visit in September instead.
Continue reading to find out loads more about when to travel to Portland, ME, then use the handy tools below to search for the best flight and hotel options that are right for you.
Quick links: Fast facts / Seasons / Average temperatures / Monthly climate / FAQs / Map
Portland, ME seasons
Before you continue, it’s important to know when the seasons are in Portland, ME as they might be different to yours depending on where in the world you’re travelling from. Portland, ME is in the Northern Hemisphere, so the seasons fall during these months:
| Season | Months |
|---|---|
| Summer | June to August |
| Autumn/fall | September to November |
| Winter | December to February |
| Spring | March to May |
Average temperatures in Portland, ME
If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Portland, ME for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.
Portland, ME climate by month
If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Portland, ME for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.
Jump to:
Portland, ME in January
- Average temperature: -3℃ (26℉)
- Average high temperature: -1℃ (31℉)
- Average low temperature: -6℃ (21℉)
- Average humidity: 79%
- Average sunny days: 19 days
- Average rainfall: 34mm (1") over 6 days
- Average snow days: 8 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Portland, ME in January, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Portland, ME in February
- Average temperature: -2℃ (28℉)
- Average high temperature: 0℃ (33℉)
- Average low temperature: -6℃ (22℉)
- Average humidity: 78%
- Average sunny days: 17 days
- Average rainfall: 39mm (2") over 6 days
- Average snow days: 7 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Portland, ME in February, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Portland, ME in March
- Average temperature: 1℃ (34℉)
- Average high temperature: 4℃ (38℉)
- Average low temperature: -2℃ (29℉)
- Average humidity: 78%
- Average sunny days: 16 days
- Average rainfall: 44mm (2") over 9 days
- Average snow days: 6 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Portland, ME in March, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Portland, ME in April
- Average temperature: 6℃ (43℉)
- Average high temperature: 9℃ (48℉)
- Average low temperature: 3℃ (38℉)
- Average humidity: 77%
- Average sunny days: 14 days
- Average rainfall: 52mm (2") over 13 days
- Average snow days: 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Portland, ME in April, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Portland, ME in May
- Average temperature: 11℃ (53℉)
- Average high temperature: 14℃ (57℉)
- Average low temperature: 8℃ (47℉)
- Average humidity: 81%
- Average sunny days: 16 days
- Average rainfall: 47mm (2") over 13 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Portland, ME in May, make sure you pack a warm jacket or coat.
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Portland, ME in June
- Average temperature: 16℃ (60℉)
- Average high temperature: 18℃ (65℉)
- Average low temperature: 13℃ (55℉)
- Average humidity: 83%
- Average sunny days: 15 days
- Average rainfall: 53mm (2") over 13 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Portland, ME in June, make sure you pack a light jumper or hoodie.
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Portland, ME in July
- Average temperature: 20℃ (67℉)
- Average high temperature: 22℃ (72℉)
- Average low temperature: 17℃ (62℉)
- Average humidity: 82%
- Average sunny days: 14 days
- Average rainfall: 43mm (2") over 14 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Portland, ME in July, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.
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Portland, ME in August
- Average temperature: 20℃ (67℉)
- Average high temperature: 22℃ (72℉)
- Average low temperature: 17℃ (62℉)
- Average humidity: 82%
- Average sunny days: 15 days
- Average rainfall: 55mm (2") over 13 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Portland, ME in August, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.
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Portland, ME in September
- Average temperature: 16℃ (61℉)
- Average high temperature: 19℃ (66℉)
- Average low temperature: 13℃ (56℉)
- Average humidity: 79%
- Average sunny days: 17 days
- Average rainfall: 30mm (1") over 10 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Portland, ME in September, make sure you pack a light jumper or hoodie.
Portland, ME in October
- Average temperature: 11℃ (52℉)
- Average high temperature: 14℃ (57℉)
- Average low temperature: 9℃ (47℉)
- Average humidity: 78%
- Average sunny days: 17 days
- Average rainfall: 60mm (2") over 12 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Portland, ME in October, make sure you pack a warm jacket or coat.
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Portland, ME in November
- Average temperature: 5℃ (42℉)
- Average high temperature: 8℃ (46℉)
- Average low temperature: 3℃ (37℉)
- Average humidity: 74%
- Average sunny days: 19 days
- Average rainfall: 43mm (2") over 9 days
- Average snow days: 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Portland, ME in November, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Portland, ME in December
- Average temperature: 0℃ (33℉)
- Average high temperature: 3℃ (37℉)
- Average low temperature: -2℃ (28℉)
- Average humidity: 77%
- Average sunny days: 18 days
- Average rainfall: 51mm (2") over 8 days
- Average snow days: 5 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Portland, ME in December, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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