Tempe weather in September: Tempe, Arizona: normal highs, lows, rain and records for September
Tempe in September has a normal high of 101°F and a normal low of 69°F, a daily mean of 85°F, falling from 104°F on the 1st to 97°F by the 30th. Measurable precipitation falls on 3 days in a normal September, 0.71 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 38°C and low of 21°C, 18 mm of precipitation in September.
- NOAA stationTempe ASU
- Station IDUSC00028499
- Location33.43°N 111.92°W
- Elevation1,167 ft (356 m)
- From the center3 miles
- Population190,114
- Jan 71° 39°
- Feb 74° 41°
- Mar 80° 46°
- Apr 87° 51°
- May 95° 59°
- Jun 104° 67°
- Jul 106° 76°
- Aug 105° 75°
- Sep 101° 69°
- Oct 91° 56°
- Nov 79° 45°
- Dec 69° 38°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Tempe in September?
The normal high is 101°F and the normal low 69°F, for a daily mean of 84.9°F. September is 5.0°F cooler than August and 11.3°F warmer than October. September is the 4th warmest month of the year in Tempe and the 7th wettest. Across the month the normal high falls 7°F, from 104°F on September 1 to 97°F on September 30. From one year to the next September's mean temperature typically moves about 1.6°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 83°F and 87°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 13%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 104°F | 73°F | 13% | 8% |
| September 8 | 103°F | 72°F | 12% | 7% |
| September 15 | 101°F | 70°F | 10% | 6% |
| September 22 | 99°F | 67°F | 9% | 5% |
| September 30 | 97°F | 63°F | 8% | 4% |
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 | 104°F | 73°F | 13% | 8% | 12 h 50 min |
| September 2 | 104°F | 73°F | 13% | 8% | 12 h 50 min |
| September 3 | 104°F | 73°F | 13% | 8% | 12 h 50 min |
| September 4 | 104°F | 72°F | 12% | 8% | 12 h 50 min |
| September 5 | 103°F | 72°F | 12% | 7% | 12 h 50 min |
| September 6 | 103°F | 72°F | 12% | 7% | 12 h 40 min |
| September 7 | 103°F | 72°F | 12% | 7% | 12 h 40 min |
| September 8 | 103°F | 72°F | 12% | 7% | 12 h 40 min |
| September 9 | 103°F | 71°F | 11% | 7% | 12 h 40 min |
| September 10 | 103°F | 71°F | 11% | 7% | 12 h 40 min |
| September 11 | 102°F | 71°F | 11% | 7% | 12 h 30 min |
| September 12 | 102°F | 71°F | 11% | 7% | 12 h 30 min |
| September 13 | 102°F | 70°F | 11% | 6% | 12 h 30 min |
| September 14 | 102°F | 70°F | 10% | 6% | 12 h 30 min |
| September 15 | 101°F | 70°F | 10% | 6% | 12 h 30 min |
| September 16 | 101°F | 69°F | 10% | 6% | 12 h 20 min |
| September 17 | 101°F | 69°F | 10% | 6% | 12 h 20 min |
| September 18 | 100°F | 69°F | 9% | 6% | 12 h 20 min |
| September 19 | 100°F | 68°F | 9% | 6% | 12 h 20 min |
| September 20 | 100°F | 68°F | 9% | 6% | 12 h 20 min |
| September 21 | 100°F | 67°F | 9% | 5% | 12 h 10 min |
| September 22 | 99°F | 67°F | 9% | 5% | 12 h 10 min |
| September 23 | 99°F | 67°F | 9% | 5% | 12 h 10 min |
| September 24 | 99°F | 66°F | 8% | 5% | 12 h 10 min |
| September 25 | 98°F | 66°F | 8% | 5% | 12 h 10 min |
| September 26 | 98°F | 65°F | 8% | 5% | 12 h |
| September 27 | 98°F | 65°F | 8% | 5% | 12 h |
| September 28 | 97°F | 64°F | 8% | 5% | 12 h |
| September 29 | 97°F | 64°F | 8% | 5% | 12 h |
| September 30 | 97°F | 63°F | 8% | 4% | 11 h 50 min |
- Normal high
- 101°FSeptember average
- Normal low
- 69°FSeptember average
- Precipitation
- 0.71 inmonth total
- Days with precipitation
- 30.01 inch or more
- Days at 90°F or more
- 29
- Daylight
- 12 h 50 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 30
- Sunshine
- 93%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00028499; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Tempe in September?
On a given September day the chance of 0.01 inch or more is 10% on average, highest around September 1 (13%). In all, 0.71 in falls on 3 days of a normal September.
In a normal September in Tempe, 29 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00028499.
What are the records for September in Tempe?
The warmest September temperature on this station's record (since 1948) is 114°F, on September 2, 1950; the coldest is 45°F, on September 30, 1965. The wettest September brought 6.11 in (2014).
The September mean against the 1991-2020 normal of 84.9°F: 2026 87.3°F (+2.4). 1 of 1 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2026 | 87.3°F | +2.4°F | 0.41 in |
Source: records: ACIS, station USC00028499; recent months: ACIS, station USC00028499. Records and recent months use complete months only.
How does September in Tempe compare across Arizona?
Across the 97 places PlainClimate covers in Arizona, September normal highs run from 70°F in Greer to 104°F in Tacna; Tempe's is 101°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.