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As of 20:02 EDT

Weather in Alton, NH

76°Current weather

Alton, Saturday, 8 August, 20:02

Partly cloudy. Feels like 77°. High 84°, low 70°.

Pressure29.85 inHg
Wind1.3 mph SW
Humidity80%
Visibility6.2 mi
Dew point70°
Sun, 0987° / 68°0Clear
87 °Clear

Alton, Sunday, 9 August

Clear. High 87°, low 68°.

Pressure29.85 inHg
Wind11.1 mph W
Humidity39%
Visibility6.2 mi
Dew point58°
Mon, 1089° / 64°0.13Rain
89 °Rain

Alton, Monday, 10 August

Rain. High 89°, low 64°.

Pressure29.94 inHg
Wind7.6 mph SW
Humidity37%
Visibility6.2 mi
Dew point55°
Tue, 1184° / 65°0Overcast
84 °Overcast

Alton, Tuesday, 11 August

Overcast. High 84°, low 65°.

Pressure29.77 inHg
Wind12.7 mph NW
Humidity44%
Visibility6.2 mi
Dew point57°
Wed, 1273° / 60°0.2Rain
73 °Rain

Alton, Wednesday, 12 August

Rain. High 73°, low 60°.

Pressure29.80 inHg
Wind3.5 mph S
Humidity92%
Visibility6.2 mi
Dew point61°
Thu, 1378° / 56°0.2Light rain
78 °Light rain

Alton, Thursday, 13 August

Light rain. High 78°, low 56°.

Pressure29.68 inHg
Wind12.3 mph NW
Humidity78%
Visibility—
Dew point65°
Fri, 1470° / 49°0Mostly clear
70 °Mostly clear

Alton, Friday, 14 August

Mostly clear. High 70°, low 49°.

Pressure29.85 inHg
Wind12.3 mph NW
Humidity54%
Visibility—
Dew point46°
Sat, 1573° / 51°0Clear
73 °Clear

Alton, Saturday, 15 August

Clear. High 73°, low 51°.

Pressure30.09 inHg
Wind10.7 mph NW
Humidity41%
Visibility—
Dew point42°
Sun, 1677° / 50°0Overcast
77 °Overcast

Alton, Sunday, 16 August

Overcast. High 77°, low 50°.

Pressure30.27 inHg
Wind6.8 mph NW
Humidity38%
Visibility—
Dew point42°
Mon, 1778° / 56°0Overcast
78 °Overcast

Alton, Monday, 17 August

Overcast. High 78°, low 56°.

Pressure30.18 inHg
Wind7.1 mph SW
Humidity44%
Visibility—
Dew point48°
Tue, 1872° / 61°0.35Rain
72 °Rain

Alton, Tuesday, 18 August

Rain. High 72°, low 61°.

Pressure30.00 inHg
Wind7.1 mph SW
Humidity96%
Visibility—
Dew point64°
Wed, 1976° / 59°0.29Rain
76 °Rain

Alton, Wednesday, 19 August

Rain. High 76°, low 59°.

Pressure29.85 inHg
Wind3.9 mph NW
Humidity83%
Visibility—
Dew point64°
Thu, 2077° / 60°0Clear
77 °Clear

Alton, Thursday, 20 August

Clear. High 77°, low 60°.

Pressure30.00 inHg
Wind6.9 mph S
Humidity45%
Visibility—
Dew point50°
Fri, 2177° / 60°0.15Light rain
77 °Light rain

Alton, Friday, 21 August

Light rain. High 77°, low 60°.

Pressure29.97 inHg
Wind9 mph S
Humidity58%
Visibility—
Dew point58°
Sat, 2280° / 62°0.35Rain
80 °Rain

Alton, Saturday, 22 August

Rain. High 80°, low 62°.

Pressure29.77 inHg
Wind5.4 mph W
Humidity93%
Visibility—
Dew point65°
Sun, 2366° / 54°0.01Light rain
66 °Light rain

Alton, Sunday, 23 August

Light rain. High 66°, low 54°.

Pressure29.74 inHg
Wind14.9 mph NW
Humidity55%
Visibility—
Dew point45°

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 Alton, NH 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 Alton, NH 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.