Roswell weather in September: Roswell, New Mexico: normal highs, lows, rain and records for September
Roswell in September has a normal high of 88°F and a normal low of 61°F, a daily mean of 74°F, falling from 92°F on the 1st to 83°F by the 30th. Measurable precipitation falls on 6 days in a normal September, 1.55 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 16°C, 39 mm of precipitation in September.
- NOAA stationRoswell Industrial Air Park
- Station IDUSW00023009
- Location33.31°N 104.51°W
- Elevation3,649 ft (1,112 m)
- Population47,176
- Jan 57° 28°
- Feb 63° 33°
- Mar 71° 39°
- Apr 79° 47°
- May 88° 57°
- Jun 96° 66°
- Jul 97° 70°
- Aug 95° 69°
- Sep 88° 61°
- Oct 78° 49°
- Nov 66° 36°
- Dec 57° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Roswell in September?
The normal high is 88°F and the normal low 61°F, for a daily mean of 74.4°F. September is 7.2°F cooler than August and 11.2°F warmer than October. September is the 4th warmest month of the year in Roswell and the 3rd wettest. Across the month the normal high falls 9°F, from 92°F on September 1 to 83°F on September 30. From one year to the next September's mean temperature typically moves about 2.7°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 72°F and 77°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 | 92°F | 66°F | 22% | 11% |
| September 8 | 90°F | 64°F | 22% | 11% |
| September 15 | 88°F | 62°F | 21% | 11% |
| September 22 | 86°F | 59°F | 20% | 10% |
| September 30 | 83°F | 56°F | 18% | 9% |
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 | 92°F | 66°F | 22% | 11% | 12 h 50 min |
| September 2 | 91°F | 66°F | 22% | 11% | 12 h 50 min |
| September 3 | 91°F | 65°F | 22% | 11% | 12 h 50 min |
| September 4 | 91°F | 65°F | 22% | 11% | 12 h 50 min |
| September 5 | 91°F | 65°F | 22% | 11% | 12 h 50 min |
| September 6 | 90°F | 65°F | 22% | 11% | 12 h 40 min |
| September 7 | 90°F | 64°F | 22% | 11% | 12 h 40 min |
| September 8 | 90°F | 64°F | 22% | 11% | 12 h 40 min |
| September 9 | 90°F | 64°F | 22% | 11% | 12 h 40 min |
| September 10 | 89°F | 63°F | 22% | 11% | 12 h 40 min |
| September 11 | 89°F | 63°F | 22% | 11% | 12 h 30 min |
| September 12 | 89°F | 63°F | 22% | 11% | 12 h 30 min |
| September 13 | 88°F | 62°F | 21% | 11% | 12 h 30 min |
| September 14 | 88°F | 62°F | 21% | 11% | 12 h 30 min |
| September 15 | 88°F | 62°F | 21% | 11% | 12 h 30 min |
| September 16 | 88°F | 61°F | 21% | 10% | 12 h 20 min |
| September 17 | 87°F | 61°F | 21% | 10% | 12 h 20 min |
| September 18 | 87°F | 61°F | 21% | 10% | 12 h 20 min |
| September 19 | 87°F | 60°F | 20% | 10% | 12 h 20 min |
| September 20 | 86°F | 60°F | 20% | 10% | 12 h 20 min |
| September 21 | 86°F | 59°F | 20% | 10% | 12 h 10 min |
| September 22 | 86°F | 59°F | 20% | 10% | 12 h 10 min |
| September 23 | 86°F | 59°F | 19% | 10% | 12 h 10 min |
| September 24 | 85°F | 58°F | 19% | 10% | 12 h 10 min |
| September 25 | 85°F | 58°F | 19% | 10% | 12 h 10 min |
| September 26 | 85°F | 57°F | 19% | 10% | 12 h |
| September 27 | 84°F | 57°F | 19% | 10% | 12 h |
| September 28 | 84°F | 57°F | 18% | 9% | 12 h |
| September 29 | 84°F | 56°F | 18% | 9% | 12 h |
| September 30 | 83°F | 56°F | 18% | 9% | 11 h 50 min |
- Normal high
- 88°FSeptember average
- Normal low
- 61°FSeptember average
- Precipitation
- 1.55 inmonth total
- Days with precipitation
- 60.01 inch or more
- Days at 90°F or more
- 13
- Daylight
- 12 h 50 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 29
- Days at 80°F or more
- 25
- Sunshine
- 87%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023009; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Roswell in September?
On a given September day the chance of 0.01 inch or more is 21% on average, highest around September 1 (22%). In all, 1.55 in falls on 6 days of a normal September.
In a normal September in Roswell, 13 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023009.
How humid and windy is Roswell in September?
At 3 p.m. the normal temperature is 82°F with 26% relative humidity and a dew point of 44°F; at 6 a.m. it is 56°F with 69% humidity. The wind averages 7.9 mph, most often from the south-southeast in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 56°F | 46°F | 69% | 5.4 mph | 80% |
| 9 a.m. | 68°F | 48°F | 49% | 8.1 mph | 80% |
| noon | 78°F | 47°F | 33% | 9.3 mph | 82% |
| 3 p.m. | 82°F | 44°F | 26% | 10.8 mph | 85% |
| 6 p.m. | 75°F | 45°F | 35% | 8.5 mph | 85% |
| 9 p.m. | 67°F | 46°F | 48% | 8.1 mph | 88% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00023009. 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 Roswell?
The warmest September temperature on Roswell's official record (since 1893) is 106°F, on September 7, 2023; the coldest is 30°F, on September 27, 1901. The wettest September brought 7.80 in (1941).
The September mean against the 1991-2020 normal of 74.4°F: 2021 76.4°F (+2.0), 2022 76.6°F (+2.2), 2023 79.8°F (+5.4), 2024 77.1°F (+2.7), 2025 74.1°F (−0.3), 2026 79.6°F (+5.2). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 76.4°F | +2.0°F | 1.16 in |
| 2022 | 76.6°F | +2.2°F | 0.13 in |
| 2023 | 79.8°F | +5.4°F | 1.78 in |
| 2024 | 77.1°F | +2.7°F | 0.27 in |
| 2025 | 74.1°F | −0.3°F | 1.41 in |
| 2026 | 79.6°F | +5.2°F | 4.94 in |
Source: records: ACIS, NWS threaded record ROWthr; recent months: ACIS, station USW00023009. Records and recent months use complete months only.
How does September in Roswell compare across New Mexico?
Across the 98 places PlainClimate covers in New Mexico, September normal highs run from 67°F in Cloudcroft to 91°F in Lordsburg; Roswell's is 88°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.