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As of 08:25 EDT

Weather in Heron Island, ME

69°Current weather

Heron Island, Sunday, 9 August, 08:25

Overcast. Feels like 70°. High 84°, low 68°.

Pressure29.85 inHg
Wind1 mph SW
Humidity96%
Visibility2.8 mi
Dew point68°
Mon, 1079° / 67°0.06Light rain
79 °Light rain

Heron Island, Monday, 10 August

Light rain. High 79°, low 67°.

Pressure29.94 inHg
Wind8.6 mph SW
Humidity67%
Visibility6.2 mi
Dew point60°
Tue, 1173° / 64°0.05Light rain
73 °Light rain

Heron Island, Tuesday, 11 August

Light rain. High 73°, low 64°.

Pressure29.71 inHg
Wind4.7 mph W
Humidity78%
Visibility6.2 mi
Dew point63°
Wed, 1271° / 63°0Overcast
71 °Overcast

Heron Island, Wednesday, 12 August

Overcast. High 71°, low 63°.

Pressure29.77 inHg
Wind9.5 mph SW
Humidity60%
Visibility6.2 mi
Dew point55°
Thu, 1371° / 64°0.06Light rain
71 °Light rain

Heron Island, Thursday, 13 August

Light rain. High 71°, low 64°.

Pressure29.62 inHg
Wind17.1 mph W
Humidity93%
Visibility—
Dew point64°
Fri, 1469° / 60°0Mostly clear
69 °Mostly clear

Heron Island, Friday, 14 August

Mostly clear. High 69°, low 60°.

Pressure29.77 inHg
Wind20.4 mph W
Humidity59%
Visibility—
Dew point50°
Sat, 1570° / 62°0Partly cloudy
70 °Partly cloudy

Heron Island, Saturday, 15 August

Partly cloudy. High 70°, low 62°.

Pressure29.83 inHg
Wind23.1 mph NW
Humidity60%
Visibility—
Dew point51°
Sun, 1671° / 61°0Overcast
71 °Overcast

Heron Island, Sunday, 16 August

Overcast. High 71°, low 61°.

Pressure30.06 inHg
Wind12.3 mph S
Humidity58%
Visibility—
Dew point53°
Mon, 1767° / 64°0.33Light rain
67 °Light rain

Heron Island, Monday, 17 August

Light rain. High 67°, low 64°.

Pressure30.03 inHg
Wind15.1 mph SE
Humidity73%
Visibility—
Dew point58°
Tue, 1868° / 61°0.2Light rain
68 °Light rain

Heron Island, Tuesday, 18 August

Light rain. High 68°, low 61°.

Pressure30.03 inHg
Wind8.7 mph NE
Humidity79%
Visibility—
Dew point58°
Wed, 1968° / 60°0Partly cloudy
68 °Partly cloudy

Heron Island, Wednesday, 19 August

Partly cloudy. High 68°, low 60°.

Pressure30.18 inHg
Wind10.4 mph S
Humidity69%
Visibility—
Dew point55°
Thu, 2070° / 65°0Overcast
70 °Overcast

Heron Island, Thursday, 20 August

Overcast. High 70°, low 65°.

Pressure30.09 inHg
Wind19.8 mph S
Humidity81%
Visibility—
Dew point62°
Fri, 2170° / 67°0.29Rain
70 °Rain

Heron Island, Friday, 21 August

Rain. High 70°, low 67°.

Pressure29.85 inHg
Wind20.1 mph S
Humidity97%
Visibility—
Dew point67°
Sat, 2274° / 66°0.04Light rain
74 °Light rain

Heron Island, Saturday, 22 August

Light rain. High 74°, low 66°.

Pressure29.85 inHg
Wind13.6 mph SW
Humidity77%
Visibility—
Dew point66°
Sun, 2372° / 65°0Partly cloudy
72 °Partly cloudy

Heron Island, Sunday, 23 August

Partly cloudy. High 72°, low 65°.

Pressure29.97 inHg
Wind8.4 mph S
Humidity76%
Visibility—
Dew point61°
Mon, 2467° / 63°0.04Light rain
67 °Light rain

Heron Island, Monday, 24 August

Light rain. High 67°, low 63°.

Pressure30.12 inHg
Wind13.2 mph NE
Humidity86%
Visibility—
Dew point60°

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 Heron Island, ME 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 Heron Island, ME 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.