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1 active weather alert

  • Frost Advisory

    Ends in 7 h 8 min

    When
    From midnight tonight to 9 AM EDT Saturday.
    Where
    Portions of central, northern, and southern New Jersey and southeast Pennsylvania.

    Issued for this forecast zone · National Weather Service Mount Holly NJ

    What, impacts and precautions

    What

    Temperatures as low as 33 degrees will result in frost formation.

    Impacts

    Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

    Precautionary actions

    Take steps now to protect tender plants from the cold.

    Areas: Middlesex; Western Monmouth; Mercer; Salem; Gloucester; Camden; Northwestern Burlington; Ocean; Cumberland; Atlantic; Southeastern Burlington; Delaware; Philadelphia; Eastern Chester; Eastern Montgomery; Lower Bucks

    See it on weather.gov (opens in a new tab)

Observed 1:30 AM EDT at KDYL

Lansdale, PA weather

Clear and 37°3°.

Today: low 33°1° (likely 33°1° to 37°3°), high 62°17° (likely 59°15° to 62°17°).

Mostly agree

Now 37°3°

Clear

Wind
Calm
Light through 1 PM
Dew point
34°1°
Dry, static shocks likely
UV index
0Low
Moderate 11 AM–4 PM · peak 4
Air quality
56Moderate
Main pollutant: PM2.5 (fine particles)
Pressure
30.47 inHg1032 hPa
Rising slowly · +0.03 inHg+1.0 hPa next 3 h

Next 2 hours

No precipitation expected in the next 2 hours.

Next 48 hours

Good hours for
  • Low 33°1° today at 6 AM
  • Above 50°10° today by 11 AM
  • High 62°17° today at 3 PM
  • Drops 12°7° tonight 6–9 PM (59°15° → 47°8°)
  • Below 50°10° tonight after 8 PM
  1. TonightNear 35°2° · Clear
  2. This morningUp to 54°12° by 11 AM · Partly cloudy
  3. This afternoonUp to 62°17° by 3 PM · Clear
  4. TonightDown to 35°2° by 3 AM · Clear
  5. Tomorrow morningUp to 55°13° by 11 AM · Clear
  6. Tomorrow afternoonUp to 64°18° by 3 PM · Clear
  7. Tomorrow nightDown to 42°6° by midnight · Clear
Hourly forecast, next 48 hours, in the place's local time
HourConditionsTemperatureFeels likePrecipitationWindHumidityCloud coverUV index
Sat 1aClear36°2° (likely 36°2° to 43°6°)36°2°0%0 mph0 km/h, gusts 4 mph7 km/h92%3%0
Sat 2aClear35°2° (likely 35°2° to 41°5°)35°2°0%0 mph0 km/h, gusts 5 mph8 km/h96%1%0
Sat 3aClear34°1° (likely 34°1° to 40°4°)34°1°0%0 mph0 km/h, gusts 6 mph9 km/h100%3%0
Sat 4aClear34°1° (likely 34°1° to 39°4°)34°1°0%0 mph0 km/h, gusts 5 mph9 km/h100%8%0
Sat 5aMostly clear34°1° (likely 34°1° to 38°3°)34°1°0%0 mph0 km/h, gusts 3 mph5 km/h100%17%0
Sat 6aMostly clear33°1° (likely 33°1° to 37°3°)33°1°0%0 mph0 km/h, gusts 3 mph6 km/h100%30%0
Sat 7aMostly sunny33°1° (likely 33°1° to 37°3°)33°1°0%0 mph0 km/h, gusts 3 mph5 km/h100%29%0
Sat 8aSunny35°2° (likely 33°1° to 38°3°)35°2°0%0 mph0 km/h, gusts 3 mph5 km/h96%23%0
Sat 9aSunny41°5° (likely 39°4° to 43°6°)41°5°0%0 mph0 km/h, gusts 4 mph6 km/h79%23%1
Sat 10aMostly sunny49°9° (likely 46°8° to 49°9°)49°9°0%0 mph0 km/h, gusts 3 mph5 km/h63%19%2
Sat 11aMostly sunny54°12° (likely 51°11° to 56°13°)54°12°0%0 mph0 km/h, gusts 3 mph5 km/h55%27%3
Sat 12pSunny57°14° (likely 55°13° to 59°15°)57°14°0%0 mph0 km/h, gusts 4 mph6 km/h47%10%4
Sat 1pSunny60°16° (likely 57°14° to 61°16°)60°16°0%0 mph0 km/h, gusts 4 mph6 km/h42%10%4
Sat 2pSunny61°16° (likely 59°15° to 62°17°)61°16°0%0 mph0 km/h, gusts 3 mph5 km/h39%9%4
Sat 3pSunny62°17° (likely 59°15° to 62°17°)62°17°0%0 mph0 km/h, gusts 3 mph4 km/h36%6%3
Sat 4pSunny62°17° (likely 59°15° to 62°17°)62°17°0%0 mph0 km/h, gusts 3 mph5 km/h36%3%2
Sat 5pSunny61°16° (likely 58°14° to 61°16°)61°16°0%0 mph0 km/h, gusts 3 mph4 km/h38%0%1
Sat 6pClear59°15° (likely 54°12° to 59°15°)59°15°0%0 mph0 km/h, gusts 2 mph4 km/h42%0%0
Sat 7pClear54°12° (likely 51°11° to 54°12°)54°12°0%0 mph0 km/h, gusts 5 mph8 km/h52%0%0
Sat 8pClear47°8° (likely 47°8° to 51°11°)47°8°0%0 mph0 km/h, gusts 5 mph8 km/h65%0%0
Sat 9pClear45°7° (likely 45°7° to 50°10°)45°7°0%0 mph0 km/h, gusts 4 mph6 km/h76%0%0
Sat 10pClear43°6° (likely 43°6° to 48°9°)43°6°0%0 mph0 km/h, gusts 4 mph6 km/h82%0%0
Sat 11pClear41°5° (likely 41°5° to 47°8°)41°5°0%0 mph0 km/h, gusts 3 mph5 km/h89%0%0
Sun 12aClear39°4° (likely 39°4° to 46°8°)39°4°0%0 mph0 km/h, gusts 3 mph6 km/h96%0%0
Sun 1aClear38°3° (likely 38°3° to 44°7°)38°3°0%0 mph0 km/h, gusts 4 mph6 km/h100%0%0
Sun 2aClear36°2° (likely 36°2° to 43°6°)36°2°0%0 mph0 km/h, gusts 3 mph6 km/h100%0%0
Sun 3aClear35°2° (likely 35°2° to 42°6°)35°2°0%0 mph0 km/h, gusts 3 mph5 km/h100%0%0
Sun 4aClear35°2° (likely 35°2° to 42°6°)35°2°0%0 mph0 km/h, gusts 3 mph4 km/h100%0%0
Sun 5aClear35°2° (likely 35°2° to 41°5°)35°2°0%0 mph0 km/h, gusts 3 mph5 km/h100%0%0
Sun 6aClear34°1° (likely 34°1° to 41°5°)34°1°0%0 mph0 km/h, gusts 3 mph5 km/h100%0%0
Sun 7aSunny34°1° (likely 34°1° to 40°4°)34°1°0%0 mph0 km/h, gusts 4 mph6 km/h100%0%0
Sun 8aSunny36°2° (likely 34°1° to 40°4°)36°2°0%0 mph0 km/h, gusts 4 mph6 km/h100%0%0
Sun 9aSunny41°5° (likely 39°4° to 45°7°)41°5°0%0 mph0 km/h, gusts 4 mph6 km/h93%0%1
Sun 10aSunny48°9° (likely 48°9° to 51°11°)48°9°0%0 mph0 km/h, gusts 4 mph7 km/h74%1%2
Sun 11aSunny55°13° (likely 55°13° to 57°14°)55°13°0%0 mph0 km/h, gusts 7 mph11 km/h64%3%3
Sun 12pSunny59°15° (likely 58°14° to 61°16°)59°15°0%0 mph0 km/h, gusts 7 mph11 km/h53%3%4
Sun 1pSunny61°16° (likely 59°15° to 64°18°)61°16°0%0 mph0 km/h, gusts 7 mph11 km/h48%2%4
Sun 2pSunny63°17° (likely 61°16° to 65°18°)63°17°0%0 mph0 km/h, gusts 7 mph11 km/h43%2%4
Sun 3pSunny64°18° (likely 62°17° to 65°18°)64°18°0%0 mph0 km/h, gusts 7 mph11 km/h41%3%3
Sun 4pSunny64°18° (likely 62°17° to 65°18°)64°18°0%0 mph0 km/h, gusts 7 mph11 km/h41%2%2
Sun 5pSunny63°17° (likely 60°16° to 64°18°)63°17°0%0 mph0 km/h, gusts 6 mph10 km/h44%0%1
Sun 6pClear59°15° (likely 56°13° to 59°15°)59°15°0%0 mph0 km/h, gusts 5 mph8 km/h53%0%0
Sun 7pClear54°12° (likely 52°11° to 54°12°)54°12°0%0 mph0 km/h, gusts 4 mph6 km/h66%0%0
Sun 8pClear50°10° (likely 49°9° to 53°12°)50°10°0%0 mph0 km/h, gusts 4 mph6 km/h77%0%0
Sun 9pClear47°8° (likely 42°6° to 53°12°)47°8°0%0 mph0 km/h, gusts 2 mph3 km/h86%0%0
Sun 10pClear45°7° (likely 39°4° to 53°12°)45°7°0%0 mph0 km/h, gusts 3 mph4 km/h93%0%0
Sun 11pClear43°6° (likely 37°3° to 51°11°)43°6°0%0 mph0 km/h, gusts 4 mph6 km/h100%0%0
Mon 12aClear42°6° (likely 36°2° to 50°10°)42°6°0%0 mph0 km/h, gusts 4 mph7 km/h100%0%0

Days ahead

Shaded: typical range for these dates (1991–2020)
  1. Today, Oct 24. Sunny. High 62°17°, low 33°1°. Typical 64°18° / 41°5°. Dry. Mostly agree.

    1. Morning

      6 AM–noon

      Sunny, 35°2°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 62°17°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 47°8°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 35°2°

      Dry

    Official NWS forecast

    Today: Areas of frost before 10am. Sunny, with a high near 62. Southeast wind around 0 mph.

    Tonight: Areas of frost. Partly cloudy, with a low around 33. Northeast wind around 0 mph.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    59°15°–62°17°
    Low, likely
    33°1°–37°3°
    Typical high / low
    64°18° / 41°5°
    Wind
    6 mph9 km/h
    UV peak
    4
  2. Tomorrow, Oct 25. Sunny. High 64°18°, low 37°3°. Typical 64°18° / 41°5°. Dry. Mostly agree.

    1. Morning

      6 AM–noon

      Sunny, 36°2°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 64°18°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 50°10°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 39°4°

      Dry

    Official NWS forecast

    Day: Areas of frost before 9am. Sunny, with a high near 64. Northwest wind around 0 mph.

    Night: Clear, with a low around 37. Northwest wind around 0 mph.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    62°17°–65°18°
    Low, likely
    34°1°–38°3°
    Typical high / low
    64°18° / 41°5°
    Wind
    6 mph9 km/h
    UV peak
    4
  3. Monday, Oct 26. Mostly sunny. High 68°20°, low 45°7°. Typical 64°18° / 40°4°. Dry. Mostly agree.

    1. Morning

      6 AM–noon

      Sunny, 39°4°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 66°19°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 55°13°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 49°10°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Sunny, with a high near 68.

    Night: Mostly clear, with a low around 45.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    65°18°–69°21°
    Low, likely
    32°0°–45°7°
    Typical high / low
    64°18° / 40°4°
    Wind
    7 mph12 km/h, gusts 16 mph26 km/h
    UV peak
    4
  4. Tuesday, Oct 27. Mostly sunny. High 65°18°, low 41°5°. Typical 63°17° / 40°4°. Dry. Mostly agree.

    1. Morning

      6 AM–noon

      Sunny, 48°9°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 61°16°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 50°10°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 39°4°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Sunny, with a high near 65.

    Night: Partly cloudy, with a low around 41.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    60°16°–65°18°
    Low, likely
    41°5°–48°9°
    Typical high / low
    63°17° / 40°4°
    Wind
    10 mph15 km/h, gusts 24 mph38 km/h
    UV peak
    4
  5. Wednesday, Oct 28. Partly sunny. High 62°17°, low 45°7°. Typical 63°17° / 40°4°. Dry. Mostly agree.

    1. Morning

      6 AM–noon

      Sunny, 39°4°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 60°16°

      Dry

    3. Evening

      6 PM–midnight

      Mostly clear, 52°11°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 44°7°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Mostly sunny, with a high near 62.

    Night: Mostly cloudy, with a low around 45.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    58°14°–63°17°
    Low, likely
    34°1°–45°7°
    Typical high / low
    63°17° / 40°4°
    Wind
    7 mph12 km/h, gusts 15 mph24 km/h
    UV peak
    4
  6. Thursday, Oct 29. Partly sunny. High 67°19°, low 49°9°. Typical 62°17° / 39°4°. Dry. Mostly agree.

    1. Morning

      6 AM–noon

      Sunny, 43°6°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 64°18°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 55°13°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 47°8°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Mostly sunny, with a high near 67.

    Night: Partly cloudy, with a low around 49.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    62°17°–67°19°
    Low, likely
    40°4°–49°9°
    Typical high / low
    62°17° / 39°4°
    Wind
    9 mph14 km/h, gusts 29 mph47 km/h
    UV peak
    4
  7. Friday, Oct 30. Partly sunny. High 68°20°, low 46°8°. Typical 62°17° / 39°4°. Dry. Forecasts differ.

    1. Morning

      6 AM–noon

      Sunny, 46°8°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 69°20°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 56°14°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 46°8°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Mostly sunny, with a high near 68.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    66°19°–72°22°
    Low, likely
    42°6°–49°9°
    Typical high / low
    62°17° / 39°4°
    Wind
    9 mph14 km/h, gusts 25 mph40 km/h
    UV peak
    4
  8. Saturday, Oct 31. Cloudy. High 67°19°, low 46°8°. Typical 62°17° / 39°4°. Dry. Forecasts differ.

    1. Morning

      6 AM–noon

      Sunny, 44°7°

      Dry

    2. Afternoon

      noon–6 PM

      Partly sunny, 66°19°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 56°14°

      Dry

    4. Overnight

      midnight–6 AM

      Partly cloudy, 48°9°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    61°16°–72°22°
    Low, likely
    41°5°–49°9°
    Typical high / low
    62°17° / 39°4°
    Wind
    9 mph14 km/h, gusts 25 mph40 km/h
    UV peak
    3
  9. Sunday, Nov 1. Cloudy. High 66°19°, low 49°9°. Typical 61°16° / 38°3°. Rain 0.01 in0.3 mm, 20% chance. Forecasts differ.

    1. Morning

      6 AM–noon

      Cloudy, 47°9°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 64°18°

      20% chance

    3. Evening

      6 PM–midnight

      Cloudy, 57°14°

      20% chance

    4. Overnight

      midnight–6 AM

      Cloudy, 56°13°

      20% chance

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    58°14°–70°21°
    Low, likely
    45°7°–54°12°
    Typical high / low
    61°16° / 38°3°
    Wind
    8 mph13 km/h, gusts 17 mph28 km/h
    UV peak
    2
  10. Monday, Nov 2. Cloudy. High 68°20°, low 57°14°. Typical 61°16° / 38°3°. Rain 0.18 in4.6 mm, 30% chance. Mostly agree.

    1. Morning

      6 AM–noon

      Cloudy, 58°15°

      20% chance

    2. Afternoon

      noon–6 PM

      Partly sunny, 69°21°

      20% chance · 0.07 in1.9 mm

    3. Evening

      6 PM–midnight

      Partly cloudy, 60°16°

      30% chance · 0.05 in1.4 mm

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    65°18°–69°21°
    Low, likely
    55°13°–59°15°
    Typical high / low
    61°16° / 38°3°
    Wind
    14 mph23 km/h, gusts 39 mph63 km/h
    UV peak
    3

The outlook

  1. Today

    Dry, high 62°, low 33°.

  2. Tomorrow

    Dry, high 64°, low 37°.

  3. Monday

    Dry, high 68°, low 45°, warming up.

  4. Rest of week

    Mostly dry, highs 62–68°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (PHI) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue
Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Perkiomen Creek at Graterford

9.0 mi
Below flood stage
Level
1.1 ft
Flow
94 cfs

Forecast peak 1.1 ft Sat 2 AM

Reading from Sat 12:15 AM · NWS gauge page

Schuylkill River at Norristown

9.7 mi
Below flood stage
Level
8.1 ft
Flow
1,360 cfs

Forecast peak 8.1 ft Sat 2 AM

Reading from Sat 12:30 AM · NWS gauge page

Neshaminy Creek near Langhorne

18 mi
Below flood stage
Level
1.1 ft
Flow
125 cfs

Forecast peak 1.1 ft Sat 2 AM

Reading from Sat 12:15 AM · NWS gauge page

Delaware River at Stockton

19 mi
Below flood stage
Level
0.6 ft
Flow
4,550 cfs

Forecast peak 0.6 ft Sat 2 AM

Reading from Sat 12 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 63% less heating than a typical week.

This week 35Typical 94

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F
26
h below 17°F
0
h below 5°F
0

47, 17 and 5°F are the test points heat pumps are rated at. About 19 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 34°F).

Open the windows?

Today, 1:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

PHOENIXVILLE 1 E · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is 2°1° colder than typical.

Normal high / low
64°18° / 41°5°
Forecast high / low
62°17° / 33°1°
Record high
82°28° in 2001
Record low
21°−6° in 1969

Last 7 days vs normal

On average 1° colder than normal (daily mean temperature).

  1. −5°−3°SunOct 18
  2. −2°−1°MonOct 19
  3. +1°±0°TueOct 20
  4. −1°WedOct 21
  5. +1°±0°ThuOct 22
  6. —FriOct 23
  7. —SatOct 24

Lansdale weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Sunrise 7:21 AM, sunset 6:08 PM.

Daylight
10 h 47 min
Losing 2 min 30 s a day; shortest Dec 21, 1 h 28 min less
Golden hour
5:30–6:25 PM
Morning 7:04–7:59 AM
Blue hour
6:25–6:36 PM
Morning 6:53–7:04 AM; first light 6:53 AM

Stars tonight? Fair

Clear 1:52–6 AM, but the moon is 96% lit and up.

Moon

Waxing gibbous

95% lit · growing

Today
sets 5:33 AM · rises 5:05 PM
Full moon
Oct 26
New moon
Nov 9
Looking west from Lansdale. The highest point on the skyline is about 4,700 ft, 62 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.