Monthly outlook for Saint John, ME: average high 47.5°, average low 35.1°. That is 0.8° below the climate normal for October. Precipitation is expected on 6 days (about 2.2 inches), against a normal of 6 days and 2.0 inches. The warmest day looks like 11 October (58.9°), the coolest 18 October (25.4°).
47.5°/35.1°
Average high / low
−0.8°
Below normal
6 / 6
Wet days / normal
2.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
44.7°
50.1°
-3°
21 October – 30 October
52.3°
45.9°
+3.5°
31 October – 9 November
at normal
42°
—
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).
Mon, 1253° / 35°0.16
53 °
Saint John, Monday, 12 October
Light rain. High 53°, low 35°.
Pressure29.71 inHg
Wind11.7 mph N
Humidity96%
Visibility5.9 mi
Dew point48°
Tue, 1343° / 34°0.06
43 °
Saint John, Tuesday, 13 October
Light rain. High 43°, low 34°.
Pressure30.12 inHg
Wind6.1 mph SE
Humidity70%
Visibility6.2 mi
Dew point30°
Wed, 1443° / 38°0.17
43 °
Saint John, Wednesday, 14 October
Light rain. High 43°, low 38°.
Pressure29.94 inHg
Wind5.1 mph E
Humidity97%
Visibility4.5 mi
Dew point40°
Thu, 1549° / 34°0
49 °
Saint John, Thursday, 15 October
Light rain. High 49°, low 34°.
Pressure30.09 inHg
Wind13.8 mph NW
Humidity59%
Visibility6.2 mi
Dew point30°
Fri, 1638° / 33°0.68
38 °
Saint John, Friday, 16 October
Snow. High 38°, low 33°.
Pressure29.80 inHg
Wind10.7 mph NW
Humidity87%
Visibility—
Dew point34°
Sat, 1738° / 28°0.02
38 °
Saint John, Saturday, 17 October
Light snow. High 38°, low 28°.
Pressure29.62 inHg
Wind18.3 mph NW
Humidity86%
Visibility—
Dew point32°
Sun, 1837° / 25°0
37 °
Saint John, Sunday, 18 October
Clear. High 37°, low 25°.
Pressure30.30 inHg
Wind12 mph NW
Humidity60%
Visibility—
Dew point20°
Mon, 1945° / 31°0
45 °
Saint John, Monday, 19 October
Overcast. High 45°, low 31°.
Pressure30.21 inHg
Wind13.2 mph SW
Humidity78%
Visibility—
Dew point34°
Tue, 2042° / 29°0
42 °
Saint John, Tuesday, 20 October
Partly cloudy. High 42°, low 29°.
Pressure30.39 inHg
Wind10.7 mph NW
Humidity66%
Visibility—
Dew point31°
Wed, 2146° / 28°0
46 °
Saint John, Wednesday, 21 October
Clear. High 46°, low 28°.
Pressure30.77 inHg
Wind4.1 mph SE
Humidity49%
Visibility—
Dew point22°
Thu, 2251° / 30°0
51 °
Saint John, Thursday, 22 October
Overcast. High 51°, low 30°.
Pressure30.59 inHg
Wind9.2 mph SW
Humidity60%
Visibility—
Dew point30°
Fri, 2357° / 45°0.02
57 °
Saint John, Friday, 23 October
Light rain. High 57°, low 45°.
Pressure30.30 inHg
Wind9.9 mph W
Humidity87%
Visibility—
Dew point49°
Sat, 2453° / 48°0.91
53 °
Saint John, Saturday, 24 October
Rain. High 53°, low 48°.
Pressure30.03 inHg
Wind10.8 mph SW
Humidity99%
Visibility—
Dew point50°
Sun, 2556° / 46°0.17
56 °
Saint John, Sunday, 25 October
Light rain. High 56°, low 46°.
Pressure29.62 inHg
Wind10.6 mph SW
Humidity96%
Visibility—
Dew point55°
Mon, 2651° / 44°0.03
51 °
Saint John, Monday, 26 October
Light rain. High 51°, low 44°.
Pressure29.83 inHg
Wind4.6 mph SW
Humidity77%
Visibility—
Dew point40°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2745° / 32°0.13
45 °
Saint John, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.13 in
Chance of precipitation37%
Record high64° (2000)
Record low19° (2018)
Wed, 2845° / 32°0.17
45 °
Saint John, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.17 in
Chance of precipitation50%
Record high66° (2023)
Record low17° (1976)
Thu, 2945° / 32°0.1
45 °
Saint John, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.1 in
Chance of precipitation28%
Record high62° (1989)
Record low22° (1965)
Fri, 3043° / 31°0.08
43 °
Saint John, Friday, 30 October
Climate normal for this date — 60-year average.
Average high43°
Average low31°
Average precipitation0.08 in
Chance of precipitation27%
Record high63° (1989)
Record low15° (1962)
Sat, 3144° / 32°0.1
44 °
Saint John, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.1 in
Chance of precipitation25%
Record high68° (2024)
Record low18° (1997)
Sun, 0145° / 32°0.11
45 °
Saint John, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.11 in
Chance of precipitation33%
Record high62° (2019)
Record low19° (1972)
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)
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.