As of 03:24 EDT

Weather in Castine, ME

41°Current weather

Castine, Friday, 16 October, 03:24

Overcast. Feels like 41°. High 58°, low 39°.

Pressure30.09 inHg
Wind1.1 mph E
Humidity89%
Visibility6.2 mi
Dew point37°

Monthly outlook for Castine, ME: average high 53.5°, average low 38.3°. That is 0.7° above the climate normal for October. Precipitation is expected on 1 day (about 0.4 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 16 October (58°), the coolest 18 October (31°).

53.5°/38.3°
Average high / low
+0.7°
Above normal
1 / 5
Wet days / normal
0.4 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
16 October – 25 October54.6°53.5°+0.6°
26 October – 4 November51.6°50°+0.9°
5 November – 14 Novemberat normal46°—

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).

Sat, 1757° / 36°0.01Light rain
57 °Light rain

Castine, Saturday, 17 October

Light rain. High 57°, low 36°.

Pressure29.94 inHg
Wind12.4 mph NW
Humidity48%
Visibility6.2 mi
Dew point28°
Sun, 1850° / 31°0Clear
50 °Clear

Castine, Sunday, 18 October

Clear. High 50°, low 31°.

Pressure30.56 inHg
Wind3.1 mph W
Humidity50%
Visibility6.2 mi
Dew point20°
Mon, 1954° / 41°0Clear
54 °Clear

Castine, Monday, 19 October

Clear. High 54°, low 41°.

Pressure30.53 inHg
Wind9.4 mph S
Humidity58%
Visibility6.2 mi
Dew point39°
Tue, 2058° / 39°0Overcast
58 °Overcast

Castine, Tuesday, 20 October

Overcast. High 58°, low 39°.

Pressure30.36 inHg
Wind8.7 mph N
Humidity69%
Visibility—
Dew point41°
Wed, 2156° / 38°0Overcast
56 °Overcast

Castine, Wednesday, 21 October

Overcast. High 56°, low 38°.

Pressure30.45 inHg
Wind9.8 mph N
Humidity58%
Visibility—
Dew point37°
Thu, 2251° / 35°0Clear
51 °Clear

Castine, Thursday, 22 October

Clear. High 51°, low 35°.

Pressure30.56 inHg
Wind6.6 mph NE
Humidity65%
Visibility—
Dew point35°
Fri, 2357° / 39°0Clear
57 °Clear

Castine, Friday, 23 October

Clear. High 57°, low 39°.

Pressure30.30 inHg
Wind6.4 mph N
Humidity59%
Visibility—
Dew point36°
Sat, 2454° / 40°0Clear
54 °Clear

Castine, Saturday, 24 October

Clear. High 54°, low 40°.

Pressure30.45 inHg
Wind11.3 mph N
Humidity53%
Visibility—
Dew point33°
Sun, 2552° / 37°0Clear
52 °Clear

Castine, Sunday, 25 October

Clear. High 52°, low 37°.

Pressure30.59 inHg
Wind5.5 mph S
Humidity64%
Visibility—
Dew point37°
Mon, 2655° / 40°0Clear
55 °Clear

Castine, Monday, 26 October

Clear. High 55°, low 40°.

Pressure30.36 inHg
Wind6.3 mph N
Humidity65%
Visibility—
Dew point38°
Tue, 2755° / 46°0Overcast
55 °Overcast

Castine, Tuesday, 27 October

Overcast. High 55°, low 46°.

Pressure30.06 inHg
Wind12.4 mph N
Humidity76%
Visibility—
Dew point44°
Wed, 2854° / 40°0Clear
54 °Clear

Castine, Wednesday, 28 October

Clear. High 54°, low 40°.

Pressure30.06 inHg
Wind11.2 mph N
Humidity58%
Visibility—
Dew point34°
Thu, 2951° / 35°0Clear
51 °Clear

Castine, Thursday, 29 October

Clear. High 51°, low 35°.

Pressure30.21 inHg
Wind7 mph S
Humidity61%
Visibility—
Dew point32°
Fri, 3049° / 38°0Overcast
49 °Overcast

Castine, Friday, 30 October

Overcast. High 49°, low 38°.

Pressure30.12 inHg
Wind9.8 mph E
Humidity77%
Visibility—
Dew point39°
Sat, 3147° / 39°0.02Light rain
47 °Light rain

Castine, Saturday, 31 October

Light rain. High 47°, low 39°.

Pressure30.03 inHg
Wind9.1 mph NE
Humidity86%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
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)
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)

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.