As of 04:42 EDT

Weather in Castine, ME

41°Current weather

Castine, Wednesday, 21 October, 04:42

Clear. Feels like 38°. High 60°, low 38°.

Pressure30.33 inHg
Wind5 mph N
Humidity79%
Visibility6.2 mi
Dew point35°

Monthly outlook for Castine, ME: average high 52.1°, average low 38.5°. That is 0.7° above the climate normal for October. Precipitation is expected on 6 days (about 2.5 inches), against a normal of 5 days and 2.3 inches. The warmest day looks like 26 October (60.3°), the coolest 1 November (30.3°).

52.1°/38.5°
Average high / low
+0.7°
Above normal
6 / 5
Wet days / normal
2.5 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
21 October – 30 October54.3°51.7°+1.4°
31 October – 9 November48.6°48.6°-0°
10 November – 19 Novemberat normal43.4°—

October records over 66 years

83.1°6 October 2025All-time high
25.7°31 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Swanville (13 mi).

Thu, 2260° / 35°0Overcast
60 °Overcast

Castine, Thursday, 22 October

Overcast. High 60°, low 35°.

Pressure29.91 inHg
Wind11.2 mph N
Humidity54%
Visibility6.2 mi
Dew point36°
Fri, 2351° / 37°0Overcast
51 °Overcast

Castine, Friday, 23 October

Overcast. High 51°, low 37°.

Pressure30.27 inHg
Wind14.8 mph N
Humidity50%
Visibility6.2 mi
Dew point27°
Sat, 2453° / 33°0Clear
53 °Clear

Castine, Saturday, 24 October

Clear. High 53°, low 33°.

Pressure30.47 inHg
Wind5.1 mph N
Humidity49%
Visibility6.2 mi
Dew point31°
Sun, 2558° / 36°0Clear
58 °Clear

Castine, Sunday, 25 October

Clear. High 58°, low 36°.

Pressure30.50 inHg
Wind6.9 mph S
Humidity50%
Visibility—
Dew point33°
Mon, 2660° / 38°0Partly cloudy
60 °Partly cloudy

Castine, Monday, 26 October

Partly cloudy. High 60°, low 38°.

Pressure30.21 inHg
Wind4 mph N
Humidity49%
Visibility—
Dew point35°
Tue, 2748° / 36°0.04Light rain
48 °Light rain

Castine, Tuesday, 27 October

Light rain. High 48°, low 36°.

Pressure30.21 inHg
Wind10.1 mph NE
Humidity70%
Visibility—
Dew point33°
Wed, 2845° / 32°0Overcast
45 °Overcast

Castine, Wednesday, 28 October

Overcast. High 45°, low 32°.

Pressure30.47 inHg
Wind7.7 mph S
Humidity39%
Visibility—
Dew point20°
Thu, 2954° / 45°0.18Light rain
54 °Light rain

Castine, Thursday, 29 October

Light rain. High 54°, low 45°.

Pressure30.21 inHg
Wind16.6 mph SE
Humidity81%
Visibility—
Dew point45°
Fri, 3054° / 36°0.06Light rain
54 °Light rain

Castine, Friday, 30 October

Light rain. High 54°, low 36°.

Pressure29.88 inHg
Wind16.2 mph W
Humidity51%
Visibility—
Dew point31°
Sat, 3142° / 32°0Clear
42 °Clear

Castine, Saturday, 31 October

Clear. High 42°, low 32°.

Pressure30.18 inHg
Wind15.5 mph NW
Humidity46%
Visibility—
Dew point19°
Sun, 0148° / 30°0Partly cloudy
48 °Partly cloudy

Castine, Sunday, 1 November

Partly cloudy. High 48°, low 30°.

Pressure30.45 inHg
Wind14.9 mph SW
Humidity44%
Visibility—
Dew point21°
Mon, 0245° / 43°0.17Light rain
45 °Light rain

Castine, Monday, 2 November

Light rain. High 45°, low 43°.

Pressure30.30 inHg
Wind9.8 mph SW
Humidity77%
Visibility—
Dew point37°
Tue, 0351° / 44°0.97Rain
51 °Rain

Castine, Tuesday, 3 November

Rain. High 51°, low 44°.

Pressure30.21 inHg
Wind8.7 mph E
Humidity97%
Visibility—
Dew point44°
Wed, 0453° / 51°1.04Rain
53 °Rain

Castine, Wednesday, 4 November

Rain. High 53°, low 51°.

Pressure30.30 inHg
Wind11.2 mph SE
Humidity98%
Visibility—
Dew point52°
Thu, 0553° / 50°0.02Light rain
53 °Light rain

Castine, Thursday, 5 November

Light rain. High 53°, low 50°.

Pressure30.33 inHg
Wind6.4 mph NE
Humidity96%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0648° / 38°0.15Climate normal
48 °Climate normal

Castine, Friday, 6 November

Climate normal for this date — 60-year average.

Average high48°
Average low38°
Average precipitation0.15 in
Chance of precipitation40%
Record high72° (2024)
Record low28° (1987)
Sat, 0748° / 37°0.05Climate normal
48 °Climate normal

Castine, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high48°
Average low37°
Average precipitation0.05 in
Chance of precipitation25%
Record high71° (2022)
Record low17° (2002)
Sun, 0846° / 35°0.11Climate normal
46 °Climate normal

Castine, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high46°
Average low35°
Average precipitation0.11 in
Chance of precipitation20%
Record high58° (1975)
Record low16° (2002)
Mon, 0946° / 35°0.12Climate normal
46 °Climate normal

Castine, Monday, 9 November

Climate normal for this date — 60-year average.

Average high46°
Average low35°
Average precipitation0.12 in
Chance of precipitation30%
Record high65° (2020)
Record low23° (1971)
Tue, 1046° / 35°0.14Climate normal
46 °Climate normal

Castine, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high46°
Average low35°
Average precipitation0.14 in
Chance of precipitation40%
Record high66° (2020)
Record low23° (1965)
Wed, 1146° / 36°0.11Climate normal
46 °Climate normal

Castine, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high46°
Average low36°
Average precipitation0.11 in
Chance of precipitation45%
Record high66° (2020)
Record low22° (2017)
Thu, 1245° / 34°0.14Climate normal
45 °Climate normal

Castine, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high45°
Average low34°
Average precipitation0.14 in
Chance of precipitation33%
Record high65° (2022)
Record low24° (1976)
Fri, 1343° / 33°0.17Climate normal
43 °Climate normal

Castine, Friday, 13 November

Climate normal for this date — 60-year average.

Average high43°
Average low33°
Average precipitation0.17 in
Chance of precipitation37%
Record high59° (1964)
Record low15° (2019)
Sat, 1443° / 32°0.11Climate normal
43 °Climate normal

Castine, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high43°
Average low32°
Average precipitation0.11 in
Chance of precipitation40%
Record high57° (2011)
Record low13° (1986)
Sun, 1544° / 33°0.15Climate normal
44 °Climate normal

Castine, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high44°
Average low33°
Average precipitation0.15 in
Chance of precipitation38%
Record high59° (1994)
Record low15° (2018)
Mon, 1643° / 32°0.17Climate normal
43 °Climate normal

Castine, Monday, 16 November

Climate normal for this date — 60-year average.

Average high43°
Average low32°
Average precipitation0.17 in
Chance of precipitation35%
Record high58° (2008)
Record low14° (2019)
Tue, 1742° / 31°0.12Climate normal
42 °Climate normal

Castine, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high42°
Average low31°
Average precipitation0.12 in
Chance of precipitation27%
Record high58° (2006)
Record low19° (1997)
Wed, 1842° / 31°0.09Climate normal
42 °Climate normal

Castine, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high42°
Average low31°
Average precipitation0.09 in
Chance of precipitation27%
Record high61° (1987)
Record low19° (1997)
Thu, 1941° / 30°0.09Climate normal
41 °Climate normal

Castine, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high41°
Average low30°
Average precipitation0.09 in
Chance of precipitation28%
Record high55° (2017)
Record low15° (2018)

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 Castine, 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 Castine, 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.