As of 10:54 EDT

Weather in Castine, ME

50°Current weather

Castine, Friday, 16 October, 10:54

Overcast. Feels like 49°. High 57°, low 37°.

Pressure29.85 inHg
Wind8 mph SE
Humidity92%
Visibility5.1 mi
Dew point48°

Monthly outlook for Castine, ME: average high 54.5°, average low 38.3°. That is 1.2° above the climate normal for October. Precipitation is expected on 1 day (about 0.7 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 20 October (59.3°), the coolest 18 October (31.7°).

54.5°/38.3°
Average high / low
+1.2°
Above normal
1 / 5
Wet days / normal
0.7 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
16 October – 25 October53.7°53.5°+0.1°
26 October – 4 November55.9°50°+3.3°
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, 1749° / 34°0Overcast
49 °Overcast

Castine, Saturday, 17 October

Overcast. High 49°, low 34°.

Pressure30.03 inHg
Wind13 mph NW
Humidity49%
Visibility6.2 mi
Dew point26°
Sun, 1852° / 32°0Clear
52 °Clear

Castine, Sunday, 18 October

Clear. High 52°, low 32°.

Pressure30.56 inHg
Wind3.9 mph W
Humidity46%
Visibility6.2 mi
Dew point25°
Mon, 1953° / 41°0Overcast
53 °Overcast

Castine, Monday, 19 October

Overcast. High 53°, low 41°.

Pressure30.50 inHg
Wind7.7 mph S
Humidity57%
Visibility6.2 mi
Dew point39°
Tue, 2059° / 38°0Overcast
59 °Overcast

Castine, Tuesday, 20 October

Overcast. High 59°, low 38°.

Pressure30.21 inHg
Wind10.4 mph N
Humidity68%
Visibility—
Dew point40°
Wed, 2155° / 39°0Clear
55 °Clear

Castine, Wednesday, 21 October

Clear. High 55°, low 39°.

Pressure30.45 inHg
Wind9.1 mph N
Humidity56%
Visibility—
Dew point33°
Thu, 2251° / 35°0Clear
51 °Clear

Castine, Thursday, 22 October

Clear. High 51°, low 35°.

Pressure30.45 inHg
Wind7.6 mph SE
Humidity65%
Visibility—
Dew point35°
Fri, 2359° / 42°0.01Light rain
59 °Light rain

Castine, Friday, 23 October

Light rain. High 59°, low 42°.

Pressure30.00 inHg
Wind15.6 mph NW
Humidity73%
Visibility—
Dew point45°
Sat, 2452° / 37°0Clear
52 °Clear

Castine, Saturday, 24 October

Clear. High 52°, low 37°.

Pressure30.24 inHg
Wind14.6 mph NW
Humidity54%
Visibility—
Dew point29°
Sun, 2549° / 34°0Clear
49 °Clear

Castine, Sunday, 25 October

Clear. High 49°, low 34°.

Pressure30.50 inHg
Wind7.6 mph S
Humidity54%
Visibility—
Dew point31°
Mon, 2655° / 41°0Overcast
55 °Overcast

Castine, Monday, 26 October

Overcast. High 55°, low 41°.

Pressure30.36 inHg
Wind6.8 mph S
Humidity68%
Visibility—
Dew point39°
Tue, 2757° / 41°0Clear
57 °Clear

Castine, Tuesday, 27 October

Clear. High 57°, low 41°.

Pressure30.33 inHg
Wind8.3 mph NE
Humidity57%
Visibility—
Dew point37°
Wed, 2852° / 40°0Overcast
52 °Overcast

Castine, Wednesday, 28 October

Overcast. High 52°, low 40°.

Pressure30.30 inHg
Wind7.7 mph SW
Humidity69%
Visibility—
Dew point39°
Thu, 2959° / 42°0.04Light rain
59 °Light rain

Castine, Thursday, 29 October

Light rain. High 59°, low 42°.

Pressure30.15 inHg
Wind11.3 mph NW
Humidity72%
Visibility—
Dew point46°
Fri, 3053° / 40°0.02Light rain
53 °Light rain

Castine, Friday, 30 October

Light rain. High 53°, low 40°.

Pressure30.21 inHg
Wind10.9 mph SW
Humidity72%
Visibility—
Dew point41°
Sat, 3159° / 39°0.02Light rain
59 °Light rain

Castine, Saturday, 31 October

Light rain. High 59°, low 39°.

Pressure30.00 inHg
Wind13.9 mph NE
Humidity75%
Visibility—
Dew point50°
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.