As of 13:57 EDT

Weather in Castine, ME

56°Current weather

Castine, Thursday, 15 October, 13:57

Clear. Feels like 53°. High 56°, low 41°.

Pressure30.09 inHg
Wind8 mph W
Humidity47%
Visibility6.2 mi
Dew point36°

Monthly outlook for Castine, ME: average high 51.8°, average low 35.3°. That is 0.5° below the climate normal for October. Precipitation is expected on 2 days (about 1.0 inches), against a normal of 5 days and 2.3 inches. The warmest day looks like 20 October (64.2°), the coolest 25 October (29.8°).

51.8°/35.3°
Average high / low
−0.5°
Below normal
2 / 5
Wet days / normal
1.0 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
15 October – 24 October53.3°53.8°-0.3°
25 October – 3 November49.2°50.4°-0.7°
4 November – 13 Novemberat normal46.6°—

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).

Fri, 1659° / 38°0.76Rain
59 °Rain

Castine, Friday, 16 October

Rain. High 59°, low 38°.

Pressure29.88 inHg
Wind14.1 mph S
Humidity94%
Visibility1.3 mi
Dew point48°
Sat, 1760° / 38°0Mostly clear
60 °Mostly clear

Castine, Saturday, 17 October

Mostly clear. High 60°, low 38°.

Pressure29.88 inHg
Wind15.1 mph NW
Humidity49%
Visibility6.2 mi
Dew point29°
Sun, 1849° / 32°0Clear
49 °Clear

Castine, Sunday, 18 October

Clear. High 49°, low 32°.

Pressure30.47 inHg
Wind6.7 mph NW
Humidity51%
Visibility6.2 mi
Dew point20°
Mon, 1957° / 45°0Clear
57 °Clear

Castine, Monday, 19 October

Clear. High 57°, low 45°.

Pressure30.45 inHg
Wind8.7 mph S
Humidity66%
Visibility6.2 mi
Dew point45°
Tue, 2064° / 42°0Mostly clear
64 °Mostly clear

Castine, Tuesday, 20 October

Mostly clear. High 64°, low 42°.

Pressure30.33 inHg
Wind6.8 mph NW
Humidity60%
Visibility—
Dew point42°
Wed, 2152° / 38°0Overcast
52 °Overcast

Castine, Wednesday, 21 October

Overcast. High 52°, low 38°.

Pressure30.36 inHg
Wind10.4 mph N
Humidity53%
Visibility—
Dew point31°
Thu, 2248° / 33°0Partly cloudy
48 °Partly cloudy

Castine, Thursday, 22 October

Partly cloudy. High 48°, low 33°.

Pressure30.42 inHg
Wind6.4 mph N
Humidity55%
Visibility—
Dew point28°
Fri, 2341° / 33°0.23Snow
41 °Snow

Castine, Friday, 23 October

Snow. High 41°, low 33°.

Pressure30.45 inHg
Wind12.2 mph NE
Humidity95%
Visibility—
Dew point35°
Sat, 2447° / 30°0Clear
47 °Clear

Castine, Saturday, 24 October

Clear. High 47°, low 30°.

Pressure30.68 inHg
Wind11.5 mph NE
Humidity53%
Visibility—
Dew point25°
Sun, 2551° / 30°0Clear
51 °Clear

Castine, Sunday, 25 October

Clear. High 51°, low 30°.

Pressure30.56 inHg
Wind9.7 mph N
Humidity49%
Visibility—
Dew point26°
Mon, 2654° / 33°0Clear
54 °Clear

Castine, Monday, 26 October

Clear. High 54°, low 33°.

Pressure30.27 inHg
Wind15 mph N
Humidity46%
Visibility—
Dew point27°
Tue, 2748° / 32°0Overcast
48 °Overcast

Castine, Tuesday, 27 October

Overcast. High 48°, low 32°.

Pressure30.33 inHg
Wind18.1 mph S
Humidity47%
Visibility—
Dew point23°
Wed, 2849° / 38°0.03Light rain
49 °Light rain

Castine, Wednesday, 28 October

Light rain. High 49°, low 38°.

Pressure29.88 inHg
Wind19.7 mph NW
Humidity57%
Visibility—
Dew point32°
Thu, 2944° / 30°0Partly cloudy
44 °Partly cloudy

Castine, Thursday, 29 October

Partly cloudy. High 44°, low 30°.

Pressure30.36 inHg
Wind8.8 mph N
Humidity51%
Visibility—
Dew point21°
Fri, 3048° / 32°0Partly cloudy
48 °Partly cloudy

Castine, Friday, 30 October

Partly cloudy. High 48°, low 32°.

Pressure30.21 inHg
Wind4.3 mph N
Humidity50%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3150° / 38°0.11Climate normal
50 °Climate normal

Castine, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high50°
Average low38°
Average precipitation0.11 in
Chance of precipitation23%
Record high73° (2024)
Record low26° (2020)
Sun, 0151° / 39°0.11Climate normal
51 °Climate normal

Castine, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high51°
Average low39°
Average precipitation0.11 in
Chance of precipitation35%
Record high71° (2024)
Record low28° (1992)
Mon, 0249° / 39°0.17Climate normal
49 °Climate normal

Castine, Monday, 2 November

Climate normal for this date — 60-year average.

Average high49°
Average low39°
Average precipitation0.17 in
Chance of precipitation33%
Record high60° (2001)
Record low23° (2002)
Tue, 0349° / 38°0.24Climate normal
49 °Climate normal

Castine, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high49°
Average low38°
Average precipitation0.24 in
Chance of precipitation45%
Record high65° (2017)
Record low22° (2002)
Wed, 0449° / 38°0.07Climate normal
49 °Climate normal

Castine, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high49°
Average low38°
Average precipitation0.07 in
Chance of precipitation30%
Record high65° (1990)
Record low24° (2020)
Thu, 0549° / 38°0.15Climate normal
49 °Climate normal

Castine, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high49°
Average low38°
Average precipitation0.15 in
Chance of precipitation38%
Record high69° (2022)
Record low24° (1965)
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)

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.