Monthly outlook for Saint John, ME: average high 46.9°, average low 30.7°. That is 0.3° above the climate normal for October. Precipitation is expected on 3 days (about 1.3 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 19 October (60.2°), the coolest 28 October (22.1°).
46.9°/30.7°
Average high / low
+0.3°
Above normal
3 / 5
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
51.9°
47.5°
+2.4°
27 October – 5 November
38.7°
43.6°
-2.7°
6 November – 15 November
at normal
38.6°
—
October records over 66 years
79.5°6 October 2025All-time high
14.9°30 October 1962All-time low
Climate normals and records are computed from the nearest reference point — Eagle Lake (13 mi).
Sun, 1849° / 29°0
49 °
Saint John, Sunday, 18 October
Mostly clear. High 49°, low 29°.
Pressure30.45 inHg
Wind7.3 mph W
Humidity58%
Visibility6.2 mi
Dew point26°
Mon, 1960° / 39°0
60 °
Saint John, Monday, 19 October
Clear. High 60°, low 39°.
Pressure30.30 inHg
Wind10.5 mph SW
Humidity52%
Visibility6.2 mi
Dew point38°
Tue, 2052° / 35°0
52 °
Saint John, Tuesday, 20 October
Clear. High 52°, low 35°.
Pressure30.39 inHg
Wind8.2 mph N
Humidity54%
Visibility6.2 mi
Dew point33°
Wed, 2150° / 31°0
50 °
Saint John, Wednesday, 21 October
Clear. High 50°, low 31°.
Pressure30.47 inHg
Wind5.2 mph S
Humidity64%
Visibility—
Dew point32°
Thu, 2254° / 33°0
54 °
Saint John, Thursday, 22 October
Partly cloudy. High 54°, low 33°.
Pressure30.12 inHg
Wind10 mph NW
Humidity56%
Visibility—
Dew point34°
Fri, 2349° / 33°0
49 °
Saint John, Friday, 23 October
Clear. High 49°, low 33°.
Pressure30.24 inHg
Wind11.3 mph NW
Humidity51%
Visibility—
Dew point28°
Sat, 2451° / 31°0
51 °
Saint John, Saturday, 24 October
Clear. High 51°, low 31°.
Pressure30.50 inHg
Wind2.9 mph SE
Humidity45%
Visibility—
Dew point24°
Sun, 2557° / 33°0
57 °
Saint John, Sunday, 25 October
Clear. High 57°, low 33°.
Pressure30.27 inHg
Wind2.3 mph SW
Humidity38%
Visibility—
Dew point24°
Mon, 2657° / 37°0
57 °
Saint John, Monday, 26 October
Partly cloudy. High 57°, low 37°.
Pressure29.94 inHg
Wind7.7 mph SW
Humidity45%
Visibility—
Dew point30°
Tue, 2745° / 31°0.81
45 °
Saint John, Tuesday, 27 October
Snow. High 45°, low 31°.
Pressure29.77 inHg
Wind14.1 mph N
Humidity94%
Visibility—
Dew point40°
Wed, 2838° / 22°0
38 °
Saint John, Wednesday, 28 October
Clear. High 38°, low 22°.
Pressure30.33 inHg
Wind13 mph N
Humidity71%
Visibility—
Dew point25°
Thu, 2937° / 22°0.26
37 °
Saint John, Thursday, 29 October
Snow. High 37°, low 22°.
Pressure30.12 inHg
Wind8.8 mph SE
Humidity68%
Visibility—
Dew point23°
Fri, 3035° / 33°0.18
35 °
Saint John, Friday, 30 October
Snow. High 35°, low 33°.
Pressure29.83 inHg
Wind7 mph SE
Humidity100%
Visibility—
Dew point34°
Sat, 3139° / 25°0
39 °
Saint John, Saturday, 31 October
Mostly clear. High 39°, low 25°.
Pressure30.21 inHg
Wind7.7 mph NW
Humidity88%
Visibility—
Dew point34°
Sun, 0138° / 25°0
38 °
Saint John, Sunday, 1 November
Overcast. High 38°, low 25°.
Pressure30.30 inHg
Wind4.9 mph SE
Humidity92%
Visibility—
Dew point34°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0243° / 31°0.13
43 °
Saint John, Monday, 2 November
Climate normal for this date — 60-year average.
Average high43°
Average low31°
Average precipitation0.13 in
Chance of precipitation38%
Record high60° (2001)
Record low13° (1993)
Tue, 0342° / 31°0.15
42 °
Saint John, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high42°
Average low31°
Average precipitation0.15 in
Chance of precipitation48%
Record high60° (1977)
Record low8° (1993)
Wed, 0442° / 30°0.09
42 °
Saint John, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.09 in
Chance of precipitation42%
Record high62° (2022)
Record low9° (2002)
Thu, 0542° / 30°0.15
42 °
Saint John, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.15 in
Chance of precipitation35%
Record high67° (2022)
Record low16° (1965)
Fri, 0642° / 31°0.11
42 °
Saint John, Friday, 6 November
Climate normal for this date — 60-year average.
Average high42°
Average low31°
Average precipitation0.11 in
Chance of precipitation38%
Record high70° (2022)
Record low13° (1962)
Sat, 0741° / 30°0.07
41 °
Saint John, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high41°
Average low30°
Average precipitation0.07 in
Chance of precipitation33%
Record high61° (2022)
Record low5° (1962)
Sun, 0839° / 28°0.06
39 °
Saint John, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high39°
Average low28°
Average precipitation0.06 in
Chance of precipitation32%
Record high57° (1996)
Record low2° (2002)
Mon, 0939° / 28°0.07
39 °
Saint John, Monday, 9 November
Climate normal for this date — 60-year average.
Average high39°
Average low28°
Average precipitation0.07 in
Chance of precipitation30%
Record high62° (2020)
Record low14° (1965)
Tue, 1039° / 28°0.1
39 °
Saint John, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high39°
Average low28°
Average precipitation0.1 in
Chance of precipitation40%
Record high67° (2020)
Record low10° (1965)
Wed, 1139° / 28°0.13
39 °
Saint John, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high39°
Average low28°
Average precipitation0.13 in
Chance of precipitation45%
Record high66° (2020)
Record low14° (1976)
Thu, 1237° / 26°0.15
37 °
Saint John, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high37°
Average low26°
Average precipitation0.15 in
Chance of precipitation33%
Record high61° (2020)
Record low9° (2004)
Fri, 1337° / 25°0.14
37 °
Saint John, Friday, 13 November
Climate normal for this date — 60-year average.
Average high37°
Average low25°
Average precipitation0.14 in
Chance of precipitation47%
Record high55° (1982)
Record low0° (2004)
Sat, 1436° / 24°0.11
36 °
Saint John, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high36°
Average low24°
Average precipitation0.11 in
Chance of precipitation43%
Record high52° (2011)
Record low3° (2019)
Sun, 1536° / 25°0.17
36 °
Saint John, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high36°
Average low25°
Average precipitation0.17 in
Chance of precipitation40%
Record high53° (2008)
Record low4° (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 Saint John, 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 Saint John, 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.