Petersburg, West Virginia Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Petersburg weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Clear——83°51°—
- FridayJun 5Overcast——86°60°+3°
- SaturdayJun 6Overcast24%—89°64°+3°
- SundayJun 7Drizzle24%—83°64°-6°
- MondayJun 8Foggy10%—87°62°+4°
- TuesdayJun 9Overcast——81°59°-6°
- WednesdayJun 10Overcast17%—87°54°+6°
Ozone at AQI 83 now. AQI up 5 over the last 6 hours (gradual rise). With UV 8.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 94 by mid-afternoon.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 83 now. With UV 8.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 94 by mid-afternoon.
- Present
- AQI 83
- UV peak
- 8.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 94
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 3:41 AM
- Moonset
- 1:19 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Petersburg at a glance
- Today vs. normal: 77°F — typical for the season
- Last frost: April 10 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Petersburg
SPC has placed Petersburg in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Petersburg's warmest month is July (~76°F mean) and its coldest is January (~34°F). Rainfall peaks in July (4.5 inches) and bottoms out in November (2.5 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 34° | 2.6″ | 9 |
| February | 36° | 2.6″ | 9 |
| March | 44° | 3.5″ | 12 |
| April | 54° | 3.5″ | 12 |
| May | 63° | 4.5″ | 15 |
| June | 72° | 4.2″ | 14 |
| July | 76° | 4.5″ | 15 |
| August | 74° | 3.6″ | 12 |
| September | 67° | 3.3″ | 11 |
| October | 55° | 2.7″ | 9 |
| November | 45° | 2.5″ | 8 |
| December | 37° | 2.9″ | 10 |
Regional context
Petersburg's baseline climate, derived from NOAA NCEI 1991-2020 normals at the nearest reporting station, swings from a January mean of 34°F to a July mean of 76°F — a 42°F seasonal arc typical of the mid-latitude bands. Annual precipitation runs about 40.3 inches spread across roughly 136 days with measurable rain or snow each year.
Precipitation runs summer-dominant here: July averages 4.5 inches across 15.0 days with measurable rain, driven mostly by warm-season storms and thunderstorm activity, while November drops to just 2.5 inches across 8.0 rainy days under drier cool-season air. That wet-warm-summer pattern groups Petersburg with places like Moorefield, WV, Davis, WV and Harman, WV — a regional cohort where summer thunderstorm season carries more than half the annual moisture.
The frost-sensitive growing window opens around mid-April, when overnight lows reliably clear freezing for cool-season crops like peas, lettuce, spinach, and radishes. Warm-season transplants — tomatoes, peppers, and basil — typically wait two weeks past that date to avoid late spring cold snaps. The window closes around mid-November, when overnight lows resume dipping below freezing and frost-tender plants need protection or harvest. These dates represent 30-year central tendencies; actual year-to-year variation can shift either bookend by 7-14 days, and local microclimate features within Petersburg — cold-air drainage on calm clear nights, slope aspect, distance from any nearby lake or river — can push the practical frost window earlier or later than the regional average.
Similar climates: Moorefield, WV, Davis, WV, Harman, WV, Thomas, WV, Bayard, WV.
Frequently asked
- When does it freeze in Petersburg?
- Petersburg's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Petersburg?
- July is the wettest month with about 4.5 inches of rain on average; the city receives roughly 40 inches annually.
- What is the warmest month in Petersburg?
- July is typically warmest, averaging about 76°F.
- What is the coldest month in Petersburg?
- January is typically coldest, averaging about 34°F.
- When can I start a vegetable garden in Petersburg?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-April); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Petersburg get?
- Petersburg averages about 136 rainy days per year.
- What hardiness zone is Petersburg?
- Petersburg's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Petersburg, West Virginia sits in a warm-summer humid continental climate zone. January means hover near 34°F while July averages 76°F — a 42°F seasonal swing.
Across the year, Petersburg receives about 40 inches of precipitation spread over roughly 136 rainy days.
The rhythm of the year is set by latitude (39.0°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.