Martinsburg weather in September: Martinsburg, West Virginia: normal highs, lows, rain and records for September
Martinsburg in September has a normal high of 78°F and a normal low of 55°F, a daily mean of 67°F, falling from 83°F on the 1st to 73°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 4.03 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 13°C, 102 mm of precipitation in September.
- NOAA stationMartinsburg Eastern West Virginia Regional Airport
- Station IDUSW00013734
- Location39.40°N 77.98°W
- Elevation534 ft (163 m)
- From the center4 miles
- Population19,047
- Jan 41° 24°
- Feb 45° 25°
- Mar 54° 32°
- Apr 65° 42°
- May 74° 51°
- Jun 82° 60°
- Jul 87° 65°
- Aug 85° 63°
- Sep 78° 55°
- Oct 67° 44°
- Nov 55° 34°
- Dec 45° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Martinsburg in September?
The normal high is 78°F and the normal low 55°F, for a daily mean of 66.7°F. September is 7.1°F cooler than August and 11.5°F warmer than October. September is the 4th warmest month of the year in Martinsburg and the 2nd wettest. Across the month the normal high falls 10°F, from 83°F on September 1 to 73°F on September 30. From one year to the next September's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 64°F and 69°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 30%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 83°F | 60°F | 29% | 19% |
| September 8 | 81°F | 58°F | 29% | 20% |
| September 15 | 79°F | 56°F | 29% | 20% |
| September 22 | 76°F | 53°F | 30% | 20% |
| September 30 | 73°F | 50°F | 30% | 19% |
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 | 83°F | 60°F | 29% | 19% | 13 h 10 min |
| September 2 | 83°F | 60°F | 29% | 19% | 13 h |
| September 3 | 82°F | 60°F | 29% | 19% | 13 h |
| September 4 | 82°F | 59°F | 29% | 20% | 13 h |
| September 5 | 82°F | 59°F | 29% | 20% | 13 h |
| September 6 | 82°F | 59°F | 29% | 20% | 12 h 50 min |
| September 7 | 81°F | 58°F | 29% | 20% | 12 h 50 min |
| September 8 | 81°F | 58°F | 29% | 20% | 12 h 50 min |
| September 9 | 81°F | 58°F | 29% | 20% | 12 h 50 min |
| September 10 | 80°F | 57°F | 29% | 20% | 12 h 40 min |
| September 11 | 80°F | 57°F | 29% | 19% | 12 h 40 min |
| September 12 | 80°F | 57°F | 29% | 19% | 12 h 40 min |
| September 13 | 79°F | 56°F | 29% | 20% | 12 h 40 min |
| September 14 | 79°F | 56°F | 29% | 20% | 12 h 30 min |
| September 15 | 79°F | 56°F | 29% | 20% | 12 h 30 min |
| September 16 | 78°F | 55°F | 29% | 20% | 12 h 30 min |
| September 17 | 78°F | 55°F | 30% | 20% | 12 h 30 min |
| September 18 | 77°F | 55°F | 30% | 20% | 12 h 20 min |
| September 19 | 77°F | 54°F | 30% | 20% | 12 h 20 min |
| September 20 | 77°F | 54°F | 30% | 20% | 12 h 20 min |
| September 21 | 76°F | 54°F | 30% | 20% | 12 h 20 min |
| September 22 | 76°F | 53°F | 30% | 20% | 12 h 10 min |
| September 23 | 75°F | 53°F | 30% | 20% | 12 h 10 min |
| September 24 | 75°F | 52°F | 30% | 20% | 12 h 10 min |
| September 25 | 75°F | 52°F | 30% | 20% | 12 h 10 min |
| September 26 | 74°F | 51°F | 30% | 19% | 12 h |
| September 27 | 74°F | 51°F | 30% | 19% | 12 h |
| September 28 | 73°F | 51°F | 30% | 19% | 12 h |
| September 29 | 73°F | 50°F | 30% | 19% | 11 h 50 min |
| September 30 | 73°F | 50°F | 30% | 19% | 11 h 50 min |
- Normal high
- 78°FSeptember average
- Normal low
- 55°FSeptember average
- Precipitation
- 4.03 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 26
- Days at 80°F or more
- 13
- Sunshine
- 75%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013734; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Martinsburg in September?
On a given September day the chance of 0.01 inch or more is 30% on average, highest around September 26 (30%). In all, 4.03 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Martinsburg, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013734.
How humid and windy is Martinsburg in September?
At 3 p.m. the normal temperature is 71°F with 51% relative humidity and a dew point of 52°F; at 6 a.m. it is 53°F with 89% humidity. The wind averages 4.9 mph, most often from the west in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 53°F | 50°F | 89% | 3.1 mph | 58% |
| 9 a.m. | 61°F | 53°F | 74% | 5.1 mph | 62% |
| noon | 69°F | 52°F | 56% | 7.5 mph | 55% |
| 3 p.m. | 71°F | 52°F | 51% | 8.3 mph | 59% |
| 6 p.m. | 66°F | 53°F | 63% | 5.0 mph | 66% |
| 9 p.m. | 59°F | 53°F | 79% | 3.2 mph | 71% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013734. 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 Martinsburg?
The warmest September temperature on Martinsburg's official record (since 1891) is 103°F, on September 2, 1932; the coldest is 29°F, on September 28, 1947. The wettest September brought 9.49 in (1945).
The September mean against the 1991-2020 normal of 66.7°F: 2021 67.7°F (+1.0), 2022 66.7°F (at normal), 2023 65.7°F (−1.0), 2024 65.6°F (−1.1), 2025 68.1°F (+1.4), 2026 69.7°F (+3.0). 3 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 67.7°F | +1.0°F | 6.73 in |
| 2022 | 66.7°F | at normal | 3.34 in |
| 2023 | 65.7°F | −1.0°F | 3.88 in |
| 2024 | 65.6°F | −1.1°F | 2.01 in |
| 2025 | 68.1°F | +1.4°F | 0.63 in |
| 2026 | 69.7°F | +3.0°F | 1.67 in |
Source: records: ACIS, NWS threaded record MRBthr; recent months: ACIS, station USW00013734. Records and recent months use complete months only.
How does September in Martinsburg compare across West Virginia?
Across the 63 places PlainClimate covers in West Virginia, September normal highs run from 68°F in Davis to 82°F in Hamlin; Martinsburg's is 78°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Martinsburg in August85°F by day, 63°F at night
- Martinsburg in October67°F by day, 44°F at night
- Martinsburg through the yearEvery month, frost dates, records and recent years
- West Virginia in SeptemberThe statewide normal and the warmest and coolest places
- Hamlin: West Virginia's warmest Septembernormal high 82°F