Rexburg weather in September: Rexburg, Idaho: normal highs, lows, rain and records for September
Rexburg in September has a normal high of 73°F and a normal low of 42°F, a daily mean of 57°F, falling from 79°F on the 1st to 66°F by the 30th. Measurable precipitation falls on 5 days in a normal September, 0.78 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 5°C, 20 mm of precipitation in September.
- NOAA stationRexburg Madison County Airport
- Station IDUSW00094194
- Location43.83°N 111.80°W
- Elevation4,858 ft (1,481 m)
- From the center1 miles
- Population40,695
- Jan 28° 13°
- Feb 32° 16°
- Mar 45° 25°
- Apr 56° 32°
- May 66° 40°
- Jun 74° 46°
- Jul 85° 52°
- Aug 84° 50°
- Sep 73° 42°
- Oct 57° 32°
- Nov 41° 23°
- Dec 29° 14°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Rexburg in September?
The normal high is 73°F and the normal low 42°F, for a daily mean of 57.4°F. September is 9.5°F cooler than August and 12.6°F warmer than October. September is the 4th warmest month of the year in Rexburg and the 8th wettest. Across the month the normal high falls 13°F, from 79°F on September 1 to 66°F on September 30. From one year to the next September's mean temperature typically moves about 2.0°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 55°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 20%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 79°F | 46°F | 15% | 7% |
| September 8 | 77°F | 44°F | 16% | 8% |
| September 15 | 74°F | 42°F | 18% | 9% |
| September 22 | 70°F | 40°F | 19% | 10% |
| September 30 | 66°F | 37°F | 20% | 10% |
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 | 79°F | 46°F | 15% | 7% | 13 h 20 min |
| September 2 | 79°F | 45°F | 15% | 7% | 13 h 10 min |
| September 3 | 79°F | 45°F | 15% | 7% | 13 h 10 min |
| September 4 | 78°F | 45°F | 16% | 7% | 13 h 10 min |
| September 5 | 78°F | 45°F | 16% | 7% | 13 h |
| September 6 | 78°F | 44°F | 16% | 8% | 13 h |
| September 7 | 77°F | 44°F | 16% | 8% | 13 h |
| September 8 | 77°F | 44°F | 16% | 8% | 13 h |
| September 9 | 76°F | 43°F | 17% | 8% | 12 h 50 min |
| September 10 | 76°F | 43°F | 17% | 8% | 12 h 50 min |
| September 11 | 75°F | 43°F | 17% | 9% | 12 h 50 min |
| September 12 | 75°F | 43°F | 17% | 9% | 12 h 40 min |
| September 13 | 75°F | 42°F | 17% | 9% | 12 h 40 min |
| September 14 | 74°F | 42°F | 17% | 9% | 12 h 40 min |
| September 15 | 74°F | 42°F | 18% | 9% | 12 h 30 min |
| September 16 | 73°F | 42°F | 18% | 9% | 12 h 30 min |
| September 17 | 73°F | 41°F | 18% | 9% | 12 h 30 min |
| September 18 | 72°F | 41°F | 18% | 9% | 12 h 30 min |
| September 19 | 72°F | 41°F | 18% | 10% | 12 h 20 min |
| September 20 | 71°F | 40°F | 18% | 10% | 12 h 20 min |
| September 21 | 71°F | 40°F | 19% | 10% | 12 h 20 min |
| September 22 | 70°F | 40°F | 19% | 10% | 12 h 10 min |
| September 23 | 70°F | 40°F | 19% | 10% | 12 h 10 min |
| September 24 | 69°F | 39°F | 19% | 10% | 12 h 10 min |
| September 25 | 69°F | 39°F | 19% | 10% | 12 h 10 min |
| September 26 | 68°F | 39°F | 19% | 10% | 12 h |
| September 27 | 68°F | 38°F | 19% | 10% | 12 h |
| September 28 | 67°F | 38°F | 19% | 10% | 12 h |
| September 29 | 66°F | 38°F | 19% | 10% | 11 h 50 min |
| September 30 | 66°F | 37°F | 20% | 10% | 11 h 50 min |
- Normal high
- 73°FSeptember average
- Normal low
- 42°FSeptember average
- Precipitation
- 0.78 inmonth total
- Days with precipitation
- 50.01 inch or more
- Days at 90°F or more
- 1
- Nights at 32°F or colder
- 2
- Daylight
- 13 h 20 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 21
- Days at 80°F or more
- 10
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094194; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Rexburg in September?
On a given September day the chance of 0.01 inch or more is 17% on average, highest around September 30 (20%). In all, 0.78 in falls on 5 days of a normal September.
In a normal September in Rexburg, 1 days reach 90°F and 2 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094194.
What are the records for September in Rexburg?
The warmest September temperature on this station's record (since 1998) is 98°F, on September 7, 2022; the coldest is 21°F, on September 28, 1999. The wettest September brought 3.85 in (2019).
The September mean against the 1991-2020 normal of 57.4°F: 2021 58.6°F (+1.2), 2022 63.9°F (+6.5), 2023 60.8°F (+3.4), 2024 60.5°F (+3.1), 2025 61.5°F (+4.1), 2026 59.9°F (+2.5). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 58.6°F | +1.2°F | 0.50 in |
| 2022 | 63.9°F | +6.5°F | 1.03 in |
| 2023 | 60.8°F | +3.4°F | 1.36 in |
| 2024 | 60.5°F | +3.1°F | 0.59 in |
| 2025 | 61.5°F | +4.1°F | 0.60 in |
| 2026 | 59.9°F | +2.5°F | 1.81 in |
Source: records: ACIS, station USW00094194; recent months: ACIS, station USW00094194. Records and recent months use complete months only.
How does September in Rexburg compare across Idaho?
Across the 85 places PlainClimate covers in Idaho, September normal highs run from 59°F in Mullan to 86°F in Glenns Ferry; Rexburg's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.