Mechanicsburg, PA Weather

Cumberland County5:59 PM EDT40.21°N, 77.01°WElevation 433 ft

Current conditions

Sunny
64°
Sunny
Feels like 64°
High 65°·Low 42°
WindCalm
Humidity56%
Dew point48°
Cloud cover7%
Sunrise7:30 AM
Sunset6:15 PM

Forecast for this hour (no station report in the last two hours)

Forecast

10-day

  • Sunday

    Sunny, with a high near 65.

  • Sunday Night

    Mostly clear, with a low around 42.

  • Monday

    Mostly sunny, with a high near 69.

National Weather Service forecast updated 4 days ago.

Hourly

Hourly forecast
  1. Now Sunny 64°
  2. 6 PM Mostly Clear 61°
  3. 7 PM Mostly Clear 58°
  4. 8 PM Mostly Clear 54°
  5. 9 PM Mostly Clear 52°
  6. 10 PM Mostly Clear 50°
  7. 11 PM Mostly Clear 48°
  8. Mon12 AM Mostly Clear 47°
  9. 1 AM Mostly Clear 46°
  10. 2 AM Mostly Clear 45°
  11. 3 AM Mostly Clear 44°
  12. 4 AM Mostly Clear 43°
  13. 5 AM Mostly Clear 43°
  14. 6 AM Sunny 42°
  15. 7 AM Sunny 42°
  16. 8 AM Mostly Sunny 43°
  17. 9 AM Mostly Sunny 46°
  18. 10 AM Mostly Sunny 51°
  19. 11 AM Mostly Sunny 56°
  20. 12 PM Mostly Sunny 60°
  21. 1 PM Mostly Sunny 64°
  22. 2 PM Mostly Sunny 67°
  23. 3 PM Mostly Sunny 69°
  24. 4 PM Mostly Sunny 69°

10-day forecast

Details
  1. TonightOct 20 Clear Clear42°
  2. WedOct 21 Sunny Sunny37°66°
  3. ThuOct 22 Sunny Sunny38°67°
  4. FriOct 23 Sunny Sunny35°60°
  5. SatOct 24 Patchy Frost then Sunny Patchy Frost then Sunny37°60°
  6. TodayOct 25 Sunny Sunny42°65°
  7. MonOct 26 Mostly Sunny Mostly Sunny47°69°
  8. TueOct 27 Mostly Sunny Mostly Sunny63°
  9. WedOct 28 Cloudy Cloudy47°60°
  10. ThuOct 29 Sunny Sunny42°55°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news in Pennsylvania

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Air quality

54
Moderate
Fine particles (PM2.5)

Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Forecast

  • SunModerate (75)
  • MonModerate (53)
  • TueGood

Susquehanna Valley, PA reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:30 AM
Sunset 6:15 PM
Daylight 10 h 45 min (−2 min 26 s tomorrow)
Full Moon · 100% lit
Moonrise 5:35 PM Moonset 6:52 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low62° / 42°
Record high76° (2021)
Record low28° (1962)
Wettest2.19 in (1980)
Month to date3.23 in (normal 3.06 in)

Middletown-Harrisburg Area, records since 1888. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in CTP, issued 3 hrs ago

What Has Changed

* No significant changes

Key Messages

1) Rain-free conditions will persist through the end of October

Discussion

KEY MESSAGE 1: Rain-free conditions will persist through the end of October

A large area of high pressure will remain in place over the Northeast U.S. and Central Appalachians. Expect mainly clear skies and rain-free conditions right through the upcoming week.

Fog is a tough call for tonight. HREF and REFS probabilities are highest around LNS and over the NW mtns. However, clouds moving in from the NW could keep the NW from getting too foggy. The best bets are the same places as have been the last few nights (W Br Susq and Susq above Harrisburg, and Lake Raystown). Have mentioned patchy fog in many places due to the uncertainty, but kept dense fog mention to IPT/LNS.

Moderate variations will occur in daily and nocturnal temperatures as at least one weak, dry cold fronts move SE across the Commonwealth during the upcoming 5-6 days. Wind direction/speed and cloud cover will also show some minor day- day variations.

The first of the aforementioned dry cold fronts will slip SE across the CWA Monday night into early Tuesday, but with only limited moisture to work with, just some periods of BKN, shallow strato cu and cirrus will occur with no rainfall expected beyond a few sprinkles over the Northern Mtns Monday night. Have kept the PoPs below mentionable for now on Mon night. This front seems like it may slide in before it makes low clouds in the nrn tier.

After a brief shot of seasonably cool air Tuesday and Wed (directed mainly at the NE half of the state), a late week/Saturday rebound in temps (to well above normal values in the low-mid 60s across the Mtns and upper 60s to mid 70s in the Central and Southern Valleys) will follow. A second, weak frontal boundary could brush by across the Northern tier counties Friday afternoon and night. New Day8 is wet (40-60 PoPs) as the pattern shifts to a more-zonal flow for the east. GFS is still dry, though. Models/members are not in as good of agreement from then onward.

Aviation

High pressure over the area will result in clear skies and light winds today into Sunday and predominantly VFR conditions well into the upcoming week. Extent of fog formation Monday morning is still uncertain, but calm winds and plentiful radiational cooling should aid in patchy fog formation across PA. The greatest chances for this are at IPT, MDT, and LNS looking at 12Z model guidance. LNS was focused in on the strongest for IFR visibility by model guidance so trends will be watched. Winds will be out of the west-northwest tomorrow with VFR conditions prevailing.

Outlook...

Mon-Fri...VFR prevailing conditions.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use. How to use Weather