Johnsonburg, Pennsylvania Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Johnsonburg weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——79°53°—
- FridayJun 5Overcast——83°58°+4°
- SaturdayJun 6Showers75%0.15″81°58°-2°
- SundayJun 7Light Showers57%—80°59°-1°
- MondayJun 8Mostly Clear——80°54°0°
- TuesdayJun 9Mostly Clear——83°55°+3°
- WednesdayJun 10Mostly Clear17%—85°55°+2°
AQI 29 (Good), driven by Ozone. AQI down 10 over the last 6 hours (steady decline since this morning).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 7 AM.
What's driving it
PM × Wind × Precip
PM2.5 at 4.7 µg/m³ (AQI 26) with a 0.90 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.90
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 3:48 AM
- Moonset
- 1:10 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Johnsonburg at a glance
- Today vs. normal: 17°F below the seasonal normal for this latitude
- Last frost: April 25 (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.
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
Johnsonburg's warmest month is July (~69°F mean) and its coldest is January (~25°F). Rainfall peaks in June (4.6 inches) and bottoms out in February (2.7 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 25° | 3.4″ | 9 |
| February | 27° | 2.7″ | 7 |
| March | 34° | 3.4″ | 8 |
| April | 46° | 3.9″ | 9 |
| May | 57° | 4.3″ | 9 |
| June | 65° | 4.6″ | 9 |
| July | 69° | 4.6″ | 8 |
| August | 68° | 3.9″ | 8 |
| September | 61° | 4.0″ | 8 |
| October | 50° | 3.8″ | 8 |
| November | 39° | 3.5″ | 8 |
| December | 31° | 3.5″ | 8 |
Regional context
Johnsonburg's baseline climate, derived from NOAA NCEI 1991-2020 normals at the nearest reporting station, swings from a January mean of 25°F to a July mean of 69°F — a 44°F seasonal arc typical of the mid-latitude bands. Annual precipitation runs about 45.6 inches spread across roughly 100 days with measurable rain or snow each year.
Rainfall stays relatively even across the calendar: June tops out at 4.6 inches across 9.4 days with measurable rain, and February settles around 2.7 inches across 7.2 rainy days — a comparatively narrow seasonal range. The temperate, evenly-distributed pattern groups Johnsonburg with places like Ridgway, PA, Wilcox, PA and St. Marys, PA, where seasonal storm tracks deliver moisture more uniformly than the continental interior.
The frost-sensitive growing window opens around mid-April, when overnight lows reliably clear freezing for cool-season crops like kale, peas, spinach, and parsnips. 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 Johnsonburg — 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: Ridgway, PA, Wilcox, PA, St. Marys, PA, Kersey, PA, James City, PA.
Frequently asked
- When does it freeze in Johnsonburg?
- Johnsonburg's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Johnsonburg?
- June is the wettest month with about 4.6 inches of rain on average; the city receives roughly 46 inches annually.
- What is the warmest month in Johnsonburg?
- July is typically warmest, averaging about 69°F.
- What is the coldest month in Johnsonburg?
- January is typically coldest, averaging about 25°F.
- When can I start a vegetable garden in Johnsonburg?
- 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 Johnsonburg get?
- Johnsonburg averages about 100 rainy days per year.
- What hardiness zone is Johnsonburg?
- Johnsonburg'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
Johnsonburg, Pennsylvania sits in a warm-summer humid continental climate zone. January means hover near 25°F while July averages 69°F — a 44°F seasonal swing.
Across the year, Johnsonburg receives about 46 inches of precipitation spread over roughly 100 rainy days.
The rhythm of the year is set by latitude (41.5°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.