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Penryn, Pennsylvania Weather

Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →

Penryn weather forecast — hour by hour, 7-day outlook, NOAA radar

Penryn, PA
Saturday, July 4 at 10:09 PM
74
°
Overcast
Feels like
76°
Humidity
74%
Wind
8 mph
Sunrise
1:41 AM
Sunset
4:38 PM
Penryn, PA
Hour by hour · 24h
24-Hour ForecastPenryn, PA: 24-hour forecast. Temperatures range from 72 to 91 degrees Fahrenheit with a 65% chance of precipitation at 9 PM.
L 72°H 91°
Penryn, PA
7-day forecast
  1. Today
    Jul 4
    Heavy Rain
    56%
    0.51″
    99°74°
  2. Sunday
    Jul 5
    Light Showers
    65%
    0.13″
    91°72°-8°
  3. Monday
    Jul 6
    Rain
    93%
    0.11″
    78°64°-13°
  4. Tuesday
    Jul 7
    Light Showers
    77%
    0.08″
    69°64°-9°
  5. Wednesday
    Jul 8
    Light Drizzle
    18%
    0.01″
    72°61°+3°
  6. Thursday
    Jul 9
    Overcast
    13%
    87°63°+15°
  7. Friday
    Jul 10
    Light Drizzle
    50%
    83°68°-4°
Penryn, PA
Anemometer · 24h winds · from true
NESW
From · True
S
178° · veering 175°
Direction
S
178°
Sustained
8
mph
Gust
9
mph
Peak 24h
27
avg 7
Beaufort · 3 · GENTLE BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 7 · pk 27 @ 3:00a
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 2210SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 175° from the s.
Penryn, PA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
993.8
+3.0 mb in 3h · rising rapidly · 29.35 inHg
Now
993.8
mb
3h
+3.0
mb
12h
-0.9
mb
24h
-1.0
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 991995
9859909951000STORM|RAIN-21h-18h-15h-12h-9h-6h-3h-24hNOW995.0990.8993.8
−24h−18h−12h−6hnow
The low is filling — pressure climbing out of storm territory.
Penryn, PA
Air quality
64
AQI
Moderate
-15 in 6h

AQI 64 (Moderate), driven by PM2.5. AQI down 15 over the last 6 hours — air quality is improving sharply. PM scrubbed by 2 hours of recent rain — PM2.5 down to 11.2 µg/m³, PM10 to 11.4 µg/m³.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5DRIVERGood
11.2μg/m³
PM 10Good
11μg/m³
NO₂Good
13μg/m³
OzoneModerate
77μg/m³
UV IndexLow
0.0

What's driving it

Ozone × UV × Sky

Ozone at AQI 36. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.

Present
AQI 36
UV peak
0.0 at 1 PM
Sky at peak
overcast
Projected peak
AQI 4

PM × Wind × Precip

PM scrubbed by 2 hours of recent rain — PM2.5 down to 11.2 µg/m³, PM10 to 11.4 µg/m³.

PM2.5/PM10
0.98
Wind
light
Recent rain
2h in last 6h
Pattern
washed out
Penryn, PA
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow

Visibility
28.3mi
UNLIMITED
120 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
02:09 UTC · Penryn, PA · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
02:09 UTC · Penryn, PA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Penryn, PA
Satellite · infrared · animated
Penryn, PA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Penryn, PA
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:09 AM
Sunrise
1:41 AM
Daylight
14h 57m
Sunset
4:38 PM
Civil dusk
9:12 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Penryn, PA
The moon
Waning Gibbous
77% illuminated
Moonrise
11:23 PM
Moonset
11:15 AM
In sign
♓︎ Pisces
Penryn, PA
Microseason
Jul 1–5

Cicadas claim the afternoon

fish
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Penryn at a glance

  • Today vs. normal: 3°F above the seasonal normal for this latitude
  • Last frost: April 17 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

16-Day Forecast — Penryn

  1. Sat99°73°56%
  2. Sun91°73°65%
  3. Mon78°64°93%
  4. Tue69°64°77%
  5. Wed72°61°18%
  6. Thu87°63°13%
  7. Fri83°68°50%
  8. Sat81°61°32%
  9. Sun78°61°29%
  10. Mon80°56°19%
  11. Tue85°58°19%
  12. Wed81°62°32%
  13. Thu82°60°30%
  14. Fri85°60°29%
  15. Sat83°66°48%
  16. Sun83°68°45%

Forecast data from Open-Meteo (CC BY 4.0).

Right now in the garden

Peak growing season

As of July 5, 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 — Penryn

SPC has placed Penryn in the Slight Risk category for severe thunderstorms today.

  • TODAYSLGTSlight Risk
  • TOMORROWSLGTSlight Risk
  • DAY 3TSTMGeneral Thunderstorms

Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.

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.

ZIP codes in Penryn

  • 17543
  • 17545
  • 17521
  • 17564

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.