Kennebunkport, ME weather in September
Expect mild weather with some rain in Kennebunkport in September, with highs near 69°F and lows near 49°F. Rain falls on about 10 days. Great for outdoor plans.
- Normal high
- 69°F
- Normal low
- 49°F
- Wet days
- 10
- 3.9 in total
- Muggy days
- 2
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 74°F | 64°F |
| Normal low | 54°F | 43°F |
| Chance of a wet day | 31% | 36% |
| Sunrise / sunset | 6:06 am / 7:17 pm | 6:38 am / 6:25 pm |
| Daylight | 13.2 h | 11.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical September day
- 6 am55°Fdew point 51°F
- 9 am64°Fdew point 54°F
- Noon68°Fdew point 53°F
- 3 pm68°Fdew point 53°F
- 6 pm63°Fdew point 53°F
- 9 pm59°Fdew point 53°F
NOAA hourly normals (local standard time) from Portland Intl Jetport (22 mi away); average wind 7 mph; clear or few clouds in 57% of daytime hours, mostly cloudy or overcast in 36%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F16 of 30
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph2 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more2 of 30
- Wet daysat least 0.01 in of rain or melted snow10 of 30
- Notable rainat least 0.10 in6 of 30
- Freezing nightslow 32°F or below1 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 3.9 in; a dry September brings about 2.2 in and a wet one about 4.9 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202015: average high 74°F
- Coolest September1995: average high 66°F
- Wettest September2008: 11.9 in
- Driest September2019: 0.6 in
- Highest reading93°F (September 10, 2016)
- Lowest reading19°F (September 19, 1995)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 76°F | 69°F | 59°F |
| Normal low | 57°F | 49°F | 38°F |
| Wet days | 10 | 10 | 12 |
| Comfortable days | 12 | 16 | 5 |
| Daylight | 13.9 h | 12.5 h | 11.0 h |
Highs change by -7°F from August and -10°F into October.
Nearby alternatives in September
- Warmer: Lowell, MA66 mi · high 76°F · 9 wet days
How Kennebunkport ranks in September
- Normal high355th warmest of 378 cities; 5th of 5 in Maine
- Wet days306th driest of 378
- Comfortable days55th most of 342
What to pack for Kennebunkport in September
- A rain jacket or umbrella – rain on about 10 days
Heating and cooling
September has 198 heating degree days and 21 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How cold is Kennebunkport in September?
The normal high is 69°F and the normal low is 49°F. From 1991 to 2020 the coldest September reading was 19°F (September 19, 1995).
Does it rain a lot in Kennebunkport in September?
About 10 days in September have at least 0.01 in of precipitation, and the normal total is 3.9 in. The wettest September in 1991-2020 was in 2008 (11.9 in); the driest was in 2019 (0.6 in).
Is September a good time to visit Kennebunkport?
September ranks 2nd of 12 months on our comfort score for Kennebunkport (70 out of 100). It has about 16 comfortable days. The best months are June, August and September.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Kennebunkport (USC00174193), 0.4 mi ESE of the city center, 20 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Portland Intl Jetport (USW00014764), 22 mi NNE of the city center, 45 ft . NOAA normals and daily records, 1991-2020.
- Cloud cover: Concord Muni Airport (USW00014745), 53 mi WSW of the city center, 346 ft (332 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Portland International Jetport Airport (726060-14764), 21 mi NNE of the city center, 44 ft . Hourly observations, 1991-2020.