As of 03:09 EDT

Weather in Lower Gwynedd, PA

73°

Lower Gwynedd, Sunday, 9 August, 03:09

Clear. Feels like 74°. High 86°, low 72°.

Pressure29.97 inHg

Wind4.2 mph W

Humidity91%

Visibility6.2 mi

Dew point69°

See detailed hourly forecast

Monthly outlook for Lower Gwynedd, PA: average high 86.8°, average low 69°. That is 2.5° above the climate normal for August. Precipitation is expected on 5 days (about 0.3 inches), against a normal of 6 days and 2.2 inches. The warmest day looks like 23 August (94.9°), the coolest 15 August (59.2°).

86.8°/69°

Average high / low

+2.5°

Above normal

5 / 6

Wet days / normal

0.3 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	83.5°	83°	+0.2°
19 August – 28 August	92.3°	81.6°	+5.9°
29 August – 7 September	at normal	80.3°	—

August records over 66 years

99.7°9 August 2001All-time high

47.1°30 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Roslyn (7 mi).

Mon, 1088° / 72°

0.02

88 °

Lower Gwynedd, Monday, 10 August

Light rain. High 88°, low 72°.

Pressure30.00 inHg

Wind6.1 mph W

Humidity41%

Visibility6.2 mi

Dew point62°

Tue, 1189° / 71°

0.06

89 °

Lower Gwynedd, Tuesday, 11 August

Light rain. High 89°, low 71°.

Pressure29.88 inHg

Wind9.5 mph NW

Humidity49%

Visibility6.2 mi

Dew point63°

Wed, 1283° / 72°

0.02

83 °

Lower Gwynedd, Wednesday, 12 August

Light rain. High 83°, low 72°.

Pressure29.77 inHg

Wind9.1 mph W

Humidity60%

Visibility6.2 mi

Dew point65°

Thu, 1384° / 69°

0.06

84 °

Lower Gwynedd, Thursday, 13 August

Light rain. High 84°, low 69°.

Pressure29.77 inHg

Wind11.9 mph NW

Humidity36%

Visibility—

Dew point52°

Fri, 1478° / 61°

78 °

Lower Gwynedd, Friday, 14 August

Overcast. High 78°, low 61°.

Pressure30.00 inHg

Wind10.2 mph NW

Humidity34%

Visibility—

Dew point44°

Sat, 1578° / 59°

78 °

Lower Gwynedd, Saturday, 15 August

Clear. High 78°, low 59°.

Pressure30.12 inHg

Wind12.5 mph NW

Humidity32%

Visibility—

Dew point42°

Sun, 1680° / 60°

80 °

Lower Gwynedd, Sunday, 16 August

Overcast. High 80°, low 60°.

Pressure30.12 inHg

Wind6.4 mph NW

Humidity29%

Visibility—

Dew point42°

Mon, 1783° / 66°

83 °

Lower Gwynedd, Monday, 17 August

Partly cloudy. High 83°, low 66°.

Pressure30.00 inHg

Wind10.8 mph SW

Humidity31%

Visibility—

Dew point48°

Tue, 1886° / 65°

86 °

Lower Gwynedd, Tuesday, 18 August

Mostly clear. High 86°, low 65°.

Pressure30.00 inHg

Wind5.8 mph S

Humidity36%

Visibility—

Dew point54°

Wed, 1989° / 70°

89 °

Lower Gwynedd, Wednesday, 19 August

Clear. High 89°, low 70°.

Pressure30.06 inHg

Wind7.1 mph SE

Humidity32%

Visibility—

Dew point53°

Thu, 2091° / 70°

91 °

Lower Gwynedd, Thursday, 20 August

Partly cloudy. High 91°, low 70°.

Pressure30.03 inHg

Wind7.5 mph S

Humidity31%

Visibility—

Dew point53°

Fri, 2194° / 74°

0.05

94 °

Lower Gwynedd, Friday, 21 August

Light rain. High 94°, low 74°.

Pressure29.85 inHg

Wind10.8 mph SW

Humidity39%

Visibility—

Dew point63°

Sat, 2293° / 74°

0.06

93 °

Lower Gwynedd, Saturday, 22 August

Light rain. High 93°, low 74°.

Pressure29.88 inHg

Wind7.7 mph NW

Humidity44%

Visibility—

Dew point65°

Sun, 2395° / 72°

95 °

Lower Gwynedd, Sunday, 23 August

Clear. High 95°, low 72°.

Pressure29.91 inHg

Wind7.1 mph W

Humidity29%

Visibility—

Dew point55°

Mon, 2492° / 78°

0.04

92 °

Lower Gwynedd, Monday, 24 August

Light rain. High 92°, low 78°.

Pressure29.94 inHg

Wind10.1 mph NW

Humidity61%

Visibility—

Dew point70°

From day 17 onward the outlook is built from 60-year climate statistics

Tue, 2582° / 65°

0.06

82 °

Lower Gwynedd, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.06 in

Chance of precipitation15%

Record high96° (1968)

Record low53° (1987)

Wed, 2683° / 65°

0.07

83 °

Lower Gwynedd, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high83°

Average low65°

Average precipitation0.07 in

Chance of precipitation23%

Record high92° (1993)

Record low55° (1963)

Thu, 2783° / 67°

0.2

83 °

Lower Gwynedd, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high83°

Average low67°

Average precipitation0.2 in

Chance of precipitation33%

Record high92° (2020)

Record low56° (1963)

Fri, 2882° / 67°

0.25

82 °

Lower Gwynedd, Friday, 28 August

Climate normal for this date — 60-year average.

Average high82°

Average low67°

Average precipitation0.25 in

Chance of precipitation43%

Record high95° (1973)

Record low56° (1986)

Sat, 2981° / 66°

0.14

81 °

Lower Gwynedd, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high81°

Average low66°

Average precipitation0.14 in

Chance of precipitation33%

Record high94° (2010)

Record low49° (1982)

Sun, 3082° / 65°

0.06

82 °

Lower Gwynedd, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.06 in

Chance of precipitation30%

Record high94° (1973)

Record low47° (1986)

Mon, 3181° / 65°

0.08

81 °

Lower Gwynedd, Monday, 31 August

Climate normal for this date — 60-year average.

Average high81°

Average low65°

Average precipitation0.08 in

Chance of precipitation25%

Record high96° (2010)

Record low51° (1976)

Tue, 0180° / 64°

0.13

80 °

Lower Gwynedd, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.13 in

Chance of precipitation33%

Record high94° (2010)

Record low55° (1967)

Wed, 0280° / 64°

0.13

80 °

Lower Gwynedd, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.13 in

Chance of precipitation33%

Record high94° (1980)

Record low53° (1970)

Thu, 0380° / 64°

0.17

80 °

Lower Gwynedd, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.17 in

Chance of precipitation30%

Record high93° (2015)

Record low50° (1967)

Fri, 0480° / 64°

0.12

80 °

Lower Gwynedd, Friday, 4 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.12 in

Chance of precipitation28%

Record high94° (2023)

Record low53° (1997)

Sat, 0580° / 64°

0.07

80 °

Lower Gwynedd, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.07 in

Chance of precipitation27%

Record high94° (2023)

Record low53° (1997)

Sun, 0679° / 64°

0.22

79 °

Lower Gwynedd, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high79°

Average low64°

Average precipitation0.22 in

Chance of precipitation35%

Record high94° (2023)

Record low51° (1984)

Mon, 0780° / 63°

0.13

80 °

Lower Gwynedd, Monday, 7 September

Climate normal for this date — 60-year average.

Average high80°

Average low63°

Average precipitation0.13 in

Chance of precipitation28%

Record high91° (1998)

Record low48° (1984)

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Lower Gwynedd, PA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Lower Gwynedd, PA since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.