Tucson weather in September: Tucson, Arizona: normal highs, lows, rain and records for September
Tucson in September has a normal high of 95°F and a normal low of 70°F, a daily mean of 83°F, falling from 98°F on the 1st to 91°F by the 30th. Measurable precipitation falls on 4 days in a normal September, 1.32 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 35°C and low of 21°C, 34 mm of precipitation in September.
- NOAA stationTucson International Airport
- Station IDUSW00023160
- Location32.13°N 110.96°W
- Elevation2,549 ft (777 m)
- From the center5 miles
- Population554,013
- Jan 67° 41°
- Feb 69° 43°
- Mar 76° 48°
- Apr 83° 53°
- May 92° 62°
- Jun 101° 71°
- Jul 100° 76°
- Aug 99° 75°
- Sep 95° 70°
- Oct 86° 59°
- Nov 75° 48°
- Dec 66° 41°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Tucson in September?
The normal high is 95°F and the normal low 70°F, for a daily mean of 82.8°F. September is 4.1°F cooler than August and 10.2°F warmer than October. September is the 4th warmest month of the year in Tucson and the 3rd wettest. Across the month the normal high falls 7°F, from 98°F on September 1 to 91°F on September 30. From one year to the next September's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 81°F and 85°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 22%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 98°F | 74°F | 22% | 11% |
| September 8 | 97°F | 73°F | 19% | 10% |
| September 15 | 96°F | 71°F | 16% | 8% |
| September 22 | 94°F | 69°F | 13% | 7% |
| September 30 | 91°F | 65°F | 11% | 6% |
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 | 98°F | 74°F | 22% | 11% | 12 h 50 min |
| September 2 | 98°F | 74°F | 22% | 11% | 12 h 50 min |
| September 3 | 98°F | 74°F | 21% | 11% | 12 h 50 min |
| September 4 | 98°F | 74°F | 21% | 11% | 12 h 50 min |
| September 5 | 98°F | 73°F | 21% | 10% | 12 h 40 min |
| September 6 | 97°F | 73°F | 20% | 10% | 12 h 40 min |
| September 7 | 97°F | 73°F | 20% | 10% | 12 h 40 min |
| September 8 | 97°F | 73°F | 19% | 10% | 12 h 40 min |
| September 9 | 97°F | 73°F | 19% | 10% | 12 h 40 min |
| September 10 | 97°F | 72°F | 18% | 9% | 12 h 30 min |
| September 11 | 96°F | 72°F | 18% | 9% | 12 h 30 min |
| September 12 | 96°F | 72°F | 17% | 9% | 12 h 30 min |
| September 13 | 96°F | 72°F | 17% | 9% | 12 h 30 min |
| September 14 | 96°F | 71°F | 16% | 8% | 12 h 30 min |
| September 15 | 96°F | 71°F | 16% | 8% | 12 h 20 min |
| September 16 | 95°F | 71°F | 15% | 8% | 12 h 20 min |
| September 17 | 95°F | 70°F | 15% | 8% | 12 h 20 min |
| September 18 | 95°F | 70°F | 15% | 7% | 12 h 20 min |
| September 19 | 94°F | 70°F | 14% | 7% | 12 h 20 min |
| September 20 | 94°F | 69°F | 14% | 7% | 12 h 10 min |
| September 21 | 94°F | 69°F | 13% | 7% | 12 h 10 min |
| September 22 | 94°F | 69°F | 13% | 7% | 12 h 10 min |
| September 23 | 93°F | 68°F | 13% | 6% | 12 h 10 min |
| September 24 | 93°F | 68°F | 13% | 6% | 12 h 10 min |
| September 25 | 93°F | 68°F | 12% | 6% | 12 h 10 min |
| September 26 | 92°F | 67°F | 12% | 6% | 12 h |
| September 27 | 92°F | 67°F | 12% | 6% | 12 h |
| September 28 | 92°F | 66°F | 12% | 6% | 12 h |
| September 29 | 92°F | 66°F | 11% | 6% | 12 h |
| September 30 | 91°F | 65°F | 11% | 6% | 12 h |
- Normal high
- 95°FSeptember average
- Normal low
- 70°FSeptember average
- Precipitation
- 1.32 inmonth total
- Days with precipitation
- 40.01 inch or more
- Days at 90°F or more
- 26
- Daylight
- 12 h 50 min to 12 hSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 30
- Sunshine
- 88%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023160; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Tucson in September?
On a given September day the chance of 0.01 inch or more is 16% on average, highest around September 1 (22%). In all, 1.32 in falls on 4 days of a normal September.
In a normal September in Tucson, 26 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023160.
How humid and windy is Tucson in September?
At 3 p.m. the normal temperature is 91°F with 18% relative humidity and a dew point of 41°F; at 6 a.m. it is 67°F with 46% humidity. The wind averages 7.5 mph, most often from the west-southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 67°F | 46°F | 46% | 7.7 mph | 90% |
| 9 a.m. | 77°F | 47°F | 35% | 7.4 mph | 90% |
| noon | 88°F | 44°F | 22% | 7.5 mph | 88% |
| 3 p.m. | 91°F | 41°F | 18% | 9.2 mph | 84% |
| 6 p.m. | 87°F | 41°F | 20% | 9.2 mph | 83% |
| 9 p.m. | 79°F | 43°F | 28% | 6.3 mph | 90% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00023160. 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 Tucson?
The warmest September temperature on Tucson's official record (since 1894) is 111°F, on September 10, 2023; the coldest is 43°F, on September 26, 1913. The wettest September brought 5.60 in (2011).
The September mean against the 1991-2020 normal of 82.8°F: 2021 83.0°F (+0.2), 2022 84.7°F (+1.9), 2023 85.7°F (+2.9), 2024 86.6°F (+3.8), 2025 84.2°F (+1.4), 2026 82.9°F (+0.1). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 83.0°F | +0.2°F | 0.71 in |
| 2022 | 84.7°F | +1.9°F | 0.81 in |
| 2023 | 85.7°F | +2.9°F | 0.34 in |
| 2024 | 86.6°F | +3.8°F | 0.12 in |
| 2025 | 84.2°F | +1.4°F | 0.83 in |
| 2026 | 82.9°F | +0.1°F | 0.80 in |
Source: records: ACIS, NWS threaded record TUSthr; recent months: ACIS, station USW00023160. Records and recent months use complete months only.
How does September in Tucson 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; Tucson's is 95°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.