Houlton weather in September: Houlton, Maine: normal highs, lows, rain and records for September
Houlton in September has a normal high of 68°F and a normal low of 44°F, a daily mean of 56°F, falling from 74°F on the 1st to 62°F by the 30th. Measurable precipitation falls on 11 days in a normal September, 3.40 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 20°C and low of 7°C, 86 mm of precipitation in September.
- NOAA stationHoulton International Airport
- Station IDUSW00014609
- Location46.12°N 67.79°W
- Elevation476 ft (145 m)
- Population (town)6,005
- Census place4,958
- Jan 23° 3°
- Feb 26° 3°
- Mar 36° 15°
- Apr 49° 28°
- May 64° 39°
- Jun 73° 48°
- Jul 78° 54°
- Aug 77° 52°
- Sep 68° 44°
- Oct 55° 34°
- Nov 41° 25°
- Dec 30° 12°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Houlton in September?
The normal high is 68°F and the normal low 44°F, for a daily mean of 56.2°F. September is 8.2°F cooler than August and 11.9°F warmer than October. September is the 4th warmest month of the year in Houlton and the 7th wettest. Across the month the normal high falls 12°F, from 74°F on September 1 to 62°F on September 30. From one year to the next September's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 54°F and 59°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 38%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 74°F | 49°F | 36% | 20% |
| September 8 | 72°F | 47°F | 36% | 20% |
| September 15 | 69°F | 44°F | 36% | 20% |
| September 22 | 66°F | 42°F | 37% | 21% |
| September 30 | 62°F | 39°F | 38% | 22% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 74°F | 49°F | 36% | 20% | 13 h 20 min |
| September 2 | 74°F | 49°F | 36% | 20% | 13 h 20 min |
| September 3 | 73°F | 49°F | 36% | 20% | 13 h 20 min |
| September 4 | 73°F | 48°F | 36% | 20% | 13 h 10 min |
| September 5 | 73°F | 48°F | 36% | 20% | 13 h 10 min |
| September 6 | 72°F | 48°F | 36% | 20% | 13 h 10 min |
| September 7 | 72°F | 47°F | 36% | 20% | 13 h |
| September 8 | 72°F | 47°F | 36% | 20% | 13 h |
| September 9 | 71°F | 47°F | 36% | 20% | 13 h |
| September 10 | 71°F | 46°F | 36% | 20% | 12 h 50 min |
| September 11 | 70°F | 46°F | 36% | 20% | 12 h 50 min |
| September 12 | 70°F | 45°F | 36% | 20% | 12 h 50 min |
| September 13 | 70°F | 45°F | 36% | 20% | 12 h 40 min |
| September 14 | 69°F | 45°F | 36% | 20% | 12 h 40 min |
| September 15 | 69°F | 44°F | 36% | 20% | 12 h 40 min |
| September 16 | 68°F | 44°F | 36% | 20% | 12 h 30 min |
| September 17 | 68°F | 44°F | 36% | 20% | 12 h 30 min |
| September 18 | 68°F | 43°F | 36% | 20% | 12 h 30 min |
| September 19 | 67°F | 43°F | 36% | 20% | 12 h 20 min |
| September 20 | 67°F | 42°F | 37% | 21% | 12 h 20 min |
| September 21 | 66°F | 42°F | 37% | 21% | 12 h 20 min |
| September 22 | 66°F | 42°F | 37% | 21% | 12 h 10 min |
| September 23 | 65°F | 41°F | 37% | 21% | 12 h 10 min |
| September 24 | 65°F | 41°F | 37% | 21% | 12 h 10 min |
| September 25 | 64°F | 40°F | 38% | 22% | 12 h 10 min |
| September 26 | 64°F | 40°F | 38% | 22% | 12 h |
| September 27 | 63°F | 40°F | 38% | 22% | 12 h |
| September 28 | 63°F | 39°F | 38% | 22% | 12 h |
| September 29 | 62°F | 39°F | 38% | 22% | 11 h 50 min |
| September 30 | 62°F | 39°F | 38% | 22% | 11 h 50 min |
- Normal high
- 68°FSeptember average
- Normal low
- 44°FSeptember average
- Precipitation
- 3.40 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 4
- Daylight
- 13 h 20 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 13
- Days at 80°F or more
- 2
- Sunshine
- 73%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014609; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Houlton in September?
On a given September day the chance of 0.01 inch or more is 36% on average, highest around September 30 (38%). In all, 3.40 in falls on 11 days of a normal September, 1 of them with an inch or more.
In a normal September in Houlton, 4 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014609.
How humid and windy is Houlton in September?
At 3 p.m. the normal temperature is 60°F with 56% relative humidity and a dew point of 45°F; at 6 a.m. it is 44°F with 92% humidity. The wind averages 6.3 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 44°F | 42°F | 92% | 4.4 mph | – |
| 9 a.m. | 54°F | 46°F | 75% | 8.4 mph | – |
| noon | 59°F | 45°F | 59% | 9.4 mph | – |
| 3 p.m. | 60°F | 45°F | 56% | 9.2 mph | – |
| 6 p.m. | 53°F | 46°F | 78% | 5.0 mph | – |
| 9 p.m. | 49°F | 44°F | 84% | 5.1 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014609. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Houlton?
The warmest September temperature on this station's record (since 1948) is 93°F, on September 1, 2010; the coldest is 20°F, on September 29, 1980. The wettest September brought 10.20 in (2015); the snowiest, 1.1 inches (1991).
The September mean against the 1991-2020 normal of 56.2°F: 2021 58.6°F (+2.4), 2022 57.2°F (+1.0), 2023 59.7°F (+3.5), 2024 58.7°F (+2.5), 2025 56.9°F (+0.7), 2026 54.6°F (−1.6). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 58.6°F | +2.4°F | 7.57 in |
| 2022 | 57.2°F | +1.0°F | 4.10 in |
| 2023 | 59.7°F | +3.5°F | 5.53 in |
| 2024 | 58.7°F | +2.5°F | 0.99 in |
| 2025 | 56.9°F | +0.7°F | 1.67 in |
| 2026 | 54.6°F | −1.6°F | 1.59 in |
Source: records: ACIS, station USW00014609; recent months: ACIS, station USW00014609. Records and recent months use complete months only.
How does September in Houlton compare across Maine?
Across the 42 places PlainClimate covers in Maine, September normal highs run from 66°F in Limestone to 73°F in Sanford; Houlton's is 68°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.