Guys Mills, Pennsylvania Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Guys Mills weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——81°52°—
- FridayJun 5Overcast——84°58°+3°
- SaturdayJun 6Showers80%0.01″76°60°-8°
- SundayJun 7Light Drizzle45%—77°59°+1°
- MondayJun 8Clear——83°55°+6°
- TuesdayJun 9Clear——86°57°+3°
- WednesdayJun 10Overcast23%—86°56°0°
PM2.5 at 6.7 µg/m³ (AQI 37) with a 0.97 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust. AQI down 16 over the last 6 hours — air quality is improving sharply.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 6.7 µg/m³ (AQI 37) with a 0.97 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.97
- 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
- 3:53 AM
- Moonset
- 1:14 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Guys Mills at a glance
- Today vs. normal: 19°F below the seasonal normal for this latitude
- Last frost: April 26 (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
Guys Mills's warmest month is July (~71°F mean) and its coldest is January (~25°F). Rainfall peaks in July (4.9 inches) and bottoms out in February (2.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 25° | 2.5″ | 6 |
| February | 27° | 2.0″ | 6 |
| March | 35° | 2.9″ | 7 |
| April | 47° | 3.8″ | 9 |
| May | 58° | 3.7″ | 8 |
| June | 66° | 4.4″ | 8 |
| July | 71° | 4.9″ | 8 |
| August | 69° | 3.7″ | 7 |
| September | 62° | 4.2″ | 7 |
| October | 51° | 3.7″ | 9 |
| November | 40° | 3.0″ | 7 |
| December | 31° | 2.6″ | 7 |
Regional context
Guys Mills'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 71°F — a 45°F seasonal arc typical of the mid-latitude bands. Annual precipitation runs about 41.4 inches spread across roughly 89 days with measurable rain or snow each year.
Precipitation runs summer-dominant here: July averages 4.9 inches across 7.9 days with measurable rain, driven mostly by warm-season storms and thunderstorm activity, while February drops to just 2.0 inches across 5.7 rainy days under drier cool-season air. That wet-warm-summer pattern groups Guys Mills with places like Blooming Valley, PA, Townville, PA and Cochranton, PA — 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 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. Those dates are 30-year averages; the actual frost-free window in a given year can vary by 10-14 days at either end. Neighborhood-scale variation in elevation and cold-air pooling means the practical last-frost date inside Guys Mills can lag the regional mean by 5-10 days in low spots, and a bench position with good cold-air drainage can run a week ahead.
Similar climates: Blooming Valley, PA, Townville, PA, Cochranton, PA, Meadville, PA, Rockdale Acres, PA.
Frequently asked
- When does it freeze in Guys Mills?
- Guys Mills's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Guys Mills?
- July is the wettest month with about 4.9 inches of rain on average; the city receives roughly 41 inches annually.
- What is the warmest month in Guys Mills?
- July is typically warmest, averaging about 71°F.
- What is the coldest month in Guys Mills?
- January is typically coldest, averaging about 25°F.
- When can I start a vegetable garden in Guys Mills?
- 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 Guys Mills get?
- Guys Mills averages about 89 rainy days per year.
- What hardiness zone is Guys Mills?
- Guys Mills'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
Guys Mills, Pennsylvania sits in a warm-summer humid continental climate zone. January means hover near 25°F while July averages 71°F — a 45°F seasonal swing.
Across the year, Guys Mills receives about 41 inches of precipitation spread over roughly 89 rainy days.
The rhythm of the year is set by latitude (41.6°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.