Bangor, ME weather in September
September in Bangor: mild, with some rain. Highs 71°F, lows 49°F, rain on about 9 days. A great month for outdoor plans.
- Normal high
- 71°F
- Normal low
- 49°F
- Wet days
- 9
- 3.8 in total
- Muggy days
- 1
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 76°F | 65°F |
| Normal low | 54°F | 43°F |
| Chance of a wet day | 30% | 34% |
| Sunrise / sunset | 5:57 am / 7:12 pm | 6:32 am / 6:18 pm |
| Daylight | 13.3 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).
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F18 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more1 of 30
- Wet daysat least 0.01 in of rain or melted snow9 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 3.8 in; a dry September brings about 1.8 in and a wet one about 5.4 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 76°F
- Coolest September1994: average high 68°F
- Wettest September1999: 9.9 in
- Driest September2020: 0.3 in
- Highest reading97°F (September 9, 2002)
- Lowest reading23°F (September 29, 2000)
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 | 79°F | 71°F | 58°F |
| Normal low | 57°F | 49°F | 38°F |
| Wet days | 10 | 9 | 11 |
| Comfortable days | 15 | 18 | 6 |
| Daylight | 14.0 h | 12.5 h | 11.0 h |
Highs change by -8°F from August and -13°F into October.
How Bangor ranks in September
- Normal high338th warmest of 378 cities; 2nd of 5 in Maine
- Wet days277th driest of 378
- Comfortable days25th most of 342
What to pack for Bangor in September
- A rain jacket or umbrella – rain on about 9 days
Heating and cooling
September has 186 heating degree days and 32 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Bangor in September?
The normal high is 71°F and the normal low is 49°F. From 1991 to 2020 the hottest September reading was 97°F (September 9, 2002).
Does it rain a lot in Bangor in September?
About 9 days in September have at least 0.01 in of precipitation, and the normal total is 3.8 in. The wettest September in 1991-2020 was in 1999 (9.9 in); the driest was in 2020 (0.3 in).
Is September a good time to visit Bangor?
September ranks 2nd of 12 months on our comfort score for Bangor (73 out of 100). It has about 18 comfortable days. The best months are June and September.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Bangor Intl Airport (USW00014606), 2.0 mi W of the city center, 148 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Millinocket Municipal Arpt (726196-14610), 59 mi N of the city center, 401 ft (286 ft higher than the city). Hourly observations, 1991-2020.
- Not available for this location: humidity and wind by hour and cloud cover (no station close enough or similar enough in elevation).