Zion National Park weather in September: Zion National Park, Utah: normal highs, lows, rain and records for September
Zion National Park in September has a normal high of 91°F and a normal low of 61°F, a daily mean of 76°F, falling from 95°F on the 1st to 85°F by the 30th. Measurable precipitation falls on 4 days in a normal September, 1.17 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 33°C and low of 16°C, 30 mm of precipitation in September.
- NOAA stationZion National Park
- Station IDUSC00429717
- Location37.21°N 112.98°W
- Elevation4,038 ft (1,231 m)
- Jan 54° 30°
- Feb 58° 34°
- Mar 66° 39°
- Apr 73° 44°
- May 84° 53°
- Jun 95° 62°
- Jul 100° 70°
- Aug 98° 69°
- Sep 91° 61°
- Oct 78° 49°
- Nov 64° 37°
- Dec 53° 29°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Zion National Park in September?
The normal high is 91°F and the normal low 61°F, for a daily mean of 76.0°F. September is 7.3°F cooler than August and 12.6°F warmer than October. September is the 4th warmest month of the year in Zion National Park and the 9th wettest. Across the month the normal high falls 10°F, from 95°F on September 1 to 85°F on September 30. From one year to the next September's mean temperature typically moves about 2.1°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 74°F and 78°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 18%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 95°F | 66°F | 18% | 9% |
| September 8 | 93°F | 64°F | 17% | 9% |
| September 15 | 91°F | 62°F | 16% | 8% |
| September 22 | 89°F | 59°F | 14% | 8% |
| September 30 | 85°F | 56°F | 14% | 8% |
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 | 95°F | 66°F | 18% | 9% | 13 h |
| September 2 | 95°F | 66°F | 18% | 9% | 13 h |
| September 3 | 95°F | 66°F | 17% | 9% | 13 h |
| September 4 | 95°F | 65°F | 17% | 9% | 12 h 50 min |
| September 5 | 94°F | 65°F | 17% | 9% | 12 h 50 min |
| September 6 | 94°F | 65°F | 17% | 9% | 12 h 50 min |
| September 7 | 94°F | 64°F | 17% | 9% | 12 h 50 min |
| September 8 | 93°F | 64°F | 17% | 9% | 12 h 50 min |
| September 9 | 93°F | 64°F | 17% | 9% | 12 h 40 min |
| September 10 | 93°F | 64°F | 17% | 8% | 12 h 40 min |
| September 11 | 93°F | 63°F | 16% | 8% | 12 h 40 min |
| September 12 | 92°F | 63°F | 16% | 8% | 12 h 40 min |
| September 13 | 92°F | 63°F | 16% | 8% | 12 h 30 min |
| September 14 | 92°F | 62°F | 16% | 8% | 12 h 30 min |
| September 15 | 91°F | 62°F | 16% | 8% | 12 h 30 min |
| September 16 | 91°F | 61°F | 15% | 8% | 12 h 30 min |
| September 17 | 91°F | 61°F | 15% | 8% | 12 h 20 min |
| September 18 | 90°F | 61°F | 15% | 8% | 12 h 20 min |
| September 19 | 90°F | 60°F | 15% | 8% | 12 h 20 min |
| September 20 | 89°F | 60°F | 15% | 8% | 12 h 20 min |
| September 21 | 89°F | 59°F | 14% | 8% | 12 h 10 min |
| September 22 | 89°F | 59°F | 14% | 8% | 12 h 10 min |
| September 23 | 88°F | 59°F | 14% | 8% | 12 h 10 min |
| September 24 | 88°F | 58°F | 14% | 8% | 12 h 10 min |
| September 25 | 87°F | 58°F | 14% | 8% | 12 h 10 min |
| September 26 | 87°F | 57°F | 14% | 8% | 12 h |
| September 27 | 87°F | 57°F | 14% | 8% | 12 h |
| September 28 | 86°F | 56°F | 14% | 8% | 12 h |
| September 29 | 86°F | 56°F | 14% | 8% | 12 h |
| September 30 | 85°F | 56°F | 14% | 8% | 11 h 50 min |
- Normal high
- 91°FSeptember average
- Normal low
- 61°FSeptember average
- Precipitation
- 1.17 inmonth total
- Days with precipitation
- 40.01 inch or more
- Days at 90°F or more
- 20
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 28
- Sunshine
- 87%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00429717; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Zion National Park in September?
On a given September day the chance of 0.01 inch or more is 16% on average, highest around September 1 (18%). In all, 1.17 in falls on 4 days of a normal September.
In a normal September in Zion National Park, 20 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00429717.
What are the records for September in Zion National Park?
The warmest September temperature on this station's record (since 1904) is 110°F, on September 1, 1950; the coldest is 33°F, on September 20, 1965. The wettest September brought 6.70 in (1939).
The September mean against the 1991-2020 normal of 76.0°F: 2022 78.2°F (+2.2), 2023 72.0°F (−4.0), 2024 79.6°F (+3.6), 2025 76.9°F (+0.9). 3 of 4 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 78.2°F | +2.2°F | 2.36 in |
| 2023 | 72.0°F | −4.0°F | 1.51 in |
| 2024 | 79.6°F | +3.6°F | 0.00 in |
| 2025 | 76.9°F | +0.9°F | 0.42 in |
Source: records: ACIS, station USC00429717; recent months: ACIS, station USC00429717. Records and recent months use complete months only.
How does September in Zion National Park compare across Utah?
Across the 97 places PlainClimate covers in Utah, September normal highs run from 61°F in Brian Head to 92°F in St. George; Zion National Park's is 91°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Zion National Park in August98°F by day, 69°F at night
- Zion National Park in October78°F by day, 49°F at night
- Zion National Park through the yearEvery month, frost dates, records and recent years
- Utah in SeptemberThe statewide normal and the warmest and coolest places
- St. George: Utah's warmest Septembernormal high 92°F