Maine (Bar Harbor)
May
Weather in Maine for May 2026
Your guide to Maine weather in May - trends and predictions
In general, the average temperature in Maine at the beginning of May is 13.6 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 17.4 °F by the end of May.
The climate of Maine in May is notably wet, with an average of 13 rainy days, and a total of 208.3 mm of precipitation.
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Temperatures
Rain 🌧️
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18
Dry days
13
Rainy days
0
Snow days
14°/7°
Temperatures
17 km/h
Avg max wind
78 %
Avg humidity
Maine Weather May
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What’s the Weather Like in Maine This May?
Discover the average temperatures and weather trends across Maine’s cities this May.
Temperatures trend during May in Maine
See the weather trend as well as the moving average line
May weather in Maine day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Overcast | 14° /3° | 0 mm | 3 | |
| May 2 |  Moderate or heavy rain shower | 8° /6° | 3.2 mm | 2 | |
| May 3 | Moderate or heavy rain shower | 18° /6° | 39.4 mm | 4 | |
| May 4 | Moderate or heavy rain shower | 15° /8° | 6 mm | 4 | |
| May 5 | Overcast | 17° /9° | 0 mm | 4 | |
| May 6 | Moderate rain at times | 10° /6° | 6.9 mm | 3 | |
| May 7 |  Patchy rain possible | 13° /7° | 5.8 mm | 3 | |
| May 8 | Patchy rain possible | 18° /7° | 0.1 mm | 4 | |
| May 9 | Overcast | 13° /8° | 0.4 mm | 3 | |
| May 10 | Moderate or heavy rain shower | 9° /5° | 33.9 mm | 2 | |
| May 11 | Overcast | 16° /8° | 0 mm | 4 | |
| May 12 | Overcast | 13° /6° | 0 mm | 3 | |
| May 13 |  Sunny | 19° /8° | 0 mm | 5 | |
| May 14 |  Cloudy | 17° /6° | 0 mm | 4 | |
| May 15 | Overcast | 20° /10° | 0.1 mm | 5 | |
| May 16 | Patchy rain possible | 18° /10° | 0.1 mm | 4 | |
| May 17 | Moderate or heavy rain shower | 12° /8° | 9.3 mm | 3 | |
| May 18 |  Heavy rain at times | 16° /7° | 15.3 mm | 4 | |
| May 19 | Moderate or heavy rain shower | 11° /7° | 7.4 mm | 3 | |
| May 20 | Patchy rain possible | 11° /6° | 0.1 mm | 3 | |
| May 21 | Patchy rain possible | 12° /6° | 0.1 mm | 3 | |
| May 22 | Patchy rain possible | 9° /5° | 0.8 mm | 2 | |
| May 23 | Moderate or heavy rain shower | 7° /4° | 27.5 mm | 2 | |
| May 24 | Moderate or heavy rain shower | 9° /6° | 9.7 mm | 2 | |
| May 25 | Overcast | 11° /6° | 0 mm | 3 | |
| May 26 | Overcast | 17° /9° | 0 mm | 4 | |
| May 27 |  Partly cloudy | 23° /10° | 0 mm | 6 | |
| May 28 | Cloudy | 24° /7° | 0 mm | 5 | |
| May 29 | Heavy rain at times | 15° /10° | 9.3 mm | 4 | |
| May 30 | Overcast | 17° /9° | 0 mm | 4 | |
| May 31 | Cloudy | 15° /9° | 32.9 mm | 4 | |
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Important Notice
Our weather forecast for Maine in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Maine forecast closer to your planned date for the most up-to-date weather information.
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Maine in May - FAQ
What are the expected maximum and minimum temperatures in Maine during May?
During May, expect a variety of temperatures with highs around 14° and lows near 7°, suitable for diverse activities and preferences.
How much rainfall should be expected in Maine during May?
Significant rainfall exceeding 208.3 mm is expected in Maine during May, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Maine during May?
The average wind speed in Maine during May is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Maine
Explore the daily rainfall trends and prepare for Maines May weather 💧
UV exposure in Maine during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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