Jackson weather in September: Jackson, Wyoming: normal highs, lows, rain and records for September
Jackson in September has a normal high of 68°F and a normal low of 33°F, a daily mean of 51°F, falling from 73°F on the 1st to 62°F by the 30th. Measurable precipitation falls on 8 days in a normal September, 1.59 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 20°C and low of 0°C, 40 mm of precipitation and 0 cm of snow in September.
- NOAA stationJackson
- Station IDUSC00484910
- Location43.49°N 110.76°W
- Elevation6,210 ft (1,893 m)
- Population10,680
- Jan 26° 6°
- Feb 30° 9°
- Mar 40° 18°
- Apr 50° 26°
- May 60° 32°
- Jun 70° 38°
- Jul 79° 41°
- Aug 78° 40°
- Sep 68° 33°
- Oct 55° 25°
- Nov 38° 16°
- Dec 26° 7°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Jackson in September?
The normal high is 68°F and the normal low 33°F, for a daily mean of 50.5°F. September is 8.4°F cooler than August and 10.8°F warmer than October. September is the 4th warmest month of the year in Jackson and the 4th wettest. Across the month the normal high falls 11°F, from 73°F on September 1 to 62°F on September 30. From one year to the next September's mean temperature typically moves about 1.5°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 49°F and 52°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 28%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 73°F | 36°F | 26% | 13% |
| September 8 | 71°F | 35°F | 27% | 13% |
| September 15 | 68°F | 33°F | 28% | 13% |
| September 22 | 66°F | 31°F | 28% | 13% |
| September 30 | 62°F | 29°F | 28% | 13% |
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 | 73°F | 36°F | 26% | 13% | 13 h 20 min |
| September 2 | 73°F | 36°F | 26% | 13% | 13 h 10 min |
| September 3 | 73°F | 36°F | 26% | 13% | 13 h 10 min |
| September 4 | 72°F | 36°F | 26% | 13% | 13 h 10 min |
| September 5 | 72°F | 35°F | 26% | 13% | 13 h |
| September 6 | 72°F | 35°F | 26% | 13% | 13 h |
| September 7 | 71°F | 35°F | 27% | 13% | 13 h |
| September 8 | 71°F | 35°F | 27% | 13% | 13 h |
| September 9 | 71°F | 34°F | 27% | 13% | 12 h 50 min |
| September 10 | 70°F | 34°F | 27% | 13% | 12 h 50 min |
| September 11 | 70°F | 34°F | 27% | 13% | 12 h 50 min |
| September 12 | 70°F | 34°F | 28% | 13% | 12 h 40 min |
| September 13 | 69°F | 33°F | 28% | 13% | 12 h 40 min |
| September 14 | 69°F | 33°F | 28% | 13% | 12 h 40 min |
| September 15 | 68°F | 33°F | 28% | 13% | 12 h 30 min |
| September 16 | 68°F | 33°F | 28% | 13% | 12 h 30 min |
| September 17 | 68°F | 32°F | 28% | 13% | 12 h 30 min |
| September 18 | 67°F | 32°F | 28% | 13% | 12 h 30 min |
| September 19 | 67°F | 32°F | 28% | 13% | 12 h 20 min |
| September 20 | 67°F | 32°F | 28% | 13% | 12 h 20 min |
| September 21 | 66°F | 31°F | 28% | 13% | 12 h 20 min |
| September 22 | 66°F | 31°F | 28% | 13% | 12 h 10 min |
| September 23 | 65°F | 31°F | 28% | 13% | 12 h 10 min |
| September 24 | 65°F | 31°F | 28% | 13% | 12 h 10 min |
| September 25 | 64°F | 30°F | 28% | 13% | 12 h 10 min |
| September 26 | 64°F | 30°F | 28% | 13% | 12 h |
| September 27 | 64°F | 30°F | 28% | 13% | 12 h |
| September 28 | 63°F | 30°F | 28% | 13% | 12 h |
| September 29 | 63°F | 29°F | 28% | 13% | 11 h 50 min |
| September 30 | 62°F | 29°F | 28% | 13% | 11 h 50 min |
- Normal high
- 68°FSeptember average
- Normal low
- 33°FSeptember average
- Precipitation
- 1.59 inmonth total
- Days with precipitation
- 80.01 inch or more
- Snowfall
- 0.1 inmonth total
- Nights at 32°F or colder
- 15
- Daylight
- 13 h 20 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 19
- Days at 80°F or more
- 4
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00484910; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Jackson in September?
On a given September day the chance of 0.01 inch or more is 27% on average, highest around September 30 (28%). In all, 1.59 in falls on 8 days of a normal September.
In a normal September in Jackson, 15 nights fall to freezing and snowfall averages 0.1 inches.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00484910.
What are the records for September in Jackson?
The warmest September temperature on this station's record (since 1905) is 93°F, on September 18, 1956; the coldest is 8°F, on September 22, 1995. The wettest September brought 6.53 in (1924); the snowiest, 3.0 inches (1936).
The September mean against the 1991-2020 normal of 50.5°F: 2021 50.3°F (−0.2), 2022 54.1°F (+3.6), 2023 50.8°F (+0.3), 2024 53.3°F (+2.8), 2025 52.2°F (+1.7), 2026 52.2°F (+1.7). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 50.3°F | −0.2°F | 0.72 in |
| 2022 | 54.1°F | +3.6°F | 1.52 in |
| 2023 | 50.8°F | +0.3°F | 2.37 in |
| 2024 | 53.3°F | +2.8°F | 1.11 in |
| 2025 | 52.2°F | +1.7°F | 1.20 in |
| 2026 | 52.2°F | +1.7°F | 1.60 in |
Source: records: ACIS, station USC00484910; recent months: ACIS, station USC00484910. Records and recent months use complete months only.
How does September in Jackson compare across Wyoming?
Across the 71 places PlainClimate covers in Wyoming, September normal highs run from 65°F in Sundance to 81°F in Yoder; Jackson's is 68°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.