Monthly outlook for Peru, MA: average high 55.7°, average low 38.8°. That is 0.5° below the climate normal for October. Precipitation is expected on 3 days (about 0.8 inches), against a normal of 5 days and 2.3 inches. The warmest day looks like 16 October (69.8°), the coolest 19 October (24.2°).
55.7°/38.8°
Average high / low
−0.5°
Below normal
3 / 5
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
58.6°
57.8°
+0.5°
18 October – 27 October
50.9°
54.1°
-1.8°
28 October – 6 November
at normal
50.9°
—
October records over 66 years
81.7°6 October 2007All-time high
15.6°31 October 2011All-time low
Climate normals and records are computed from the nearest reference point — Chester (11 mi).
Fri, 0958° / 40°0.01
58 °
Peru, Friday, 9 October
Light rain. High 58°, low 40°.
Pressure30.09 inHg
Wind13.7 mph W
Humidity61%
Visibility5.5 mi
Dew point41°
Sat, 1057° / 39°0
57 °
Peru, Saturday, 10 October
Overcast. High 57°, low 39°.
Pressure30.47 inHg
Wind6.3 mph NW
Humidity47%
Visibility6.2 mi
Dew point34°
Sun, 1157° / 40°0.36
57 °
Peru, Sunday, 11 October
Rain. High 57°, low 40°.
Pressure30.36 inHg
Wind7.8 mph S
Humidity59%
Visibility6.2 mi
Dew point43°
Mon, 1262° / 49°0.4
62 °
Peru, Monday, 12 October
Rain. High 62°, low 49°.
Pressure29.80 inHg
Wind4 mph N
Humidity86%
Visibility6.2 mi
Dew point54°
Tue, 1365° / 46°0.02
65 °
Peru, Tuesday, 13 October
Light rain. High 65°, low 46°.
Pressure29.68 inHg
Wind14.7 mph NW
Humidity88%
Visibility—
Dew point53°
Wed, 1450° / 37°0
50 °
Peru, Wednesday, 14 October
Overcast. High 50°, low 37°.
Pressure30.03 inHg
Wind13.8 mph NW
Humidity61%
Visibility—
Dew point31°
Thu, 1558° / 36°0
58 °
Peru, Thursday, 15 October
Overcast. High 58°, low 36°.
Pressure30.27 inHg
Wind8.1 mph SW
Humidity45%
Visibility—
Dew point29°
Fri, 1670° / 49°0.01
70 °
Peru, Friday, 16 October
Light rain. High 70°, low 49°.
Pressure30.00 inHg
Wind14.9 mph W
Humidity76%
Visibility—
Dew point55°
Sat, 1748° / 33°0
48 °
Peru, Saturday, 17 October
Overcast. High 48°, low 33°.
Pressure30.00 inHg
Wind16.7 mph W
Humidity53%
Visibility—
Dew point27°
Sun, 1839° / 27°0
39 °
Peru, Sunday, 18 October
Clear. High 39°, low 27°.
Pressure30.33 inHg
Wind15.4 mph NW
Humidity45%
Visibility—
Dew point15°
Mon, 1945° / 24°0
45 °
Peru, Monday, 19 October
Clear. High 45°, low 24°.
Pressure30.56 inHg
Wind10.2 mph NW
Humidity35%
Visibility—
Dew point13°
Tue, 2054° / 33°0
54 °
Peru, Tuesday, 20 October
Clear. High 54°, low 33°.
Pressure30.36 inHg
Wind10.2 mph NW
Humidity56%
Visibility—
Dew point31°
Wed, 2155° / 38°0
55 °
Peru, Wednesday, 21 October
Mostly clear. High 55°, low 38°.
Pressure30.42 inHg
Wind6.6 mph SE
Humidity57%
Visibility—
Dew point35°
Thu, 2258° / 42°0
58 °
Peru, Thursday, 22 October
Partly cloudy. High 58°, low 42°.
Pressure30.24 inHg
Wind10.9 mph SW
Humidity49%
Visibility—
Dew point34°
Fri, 2354° / 42°0
54 °
Peru, Friday, 23 October
Overcast. High 54°, low 42°.
Pressure30.09 inHg
Wind11.7 mph NW
Humidity66%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2454° / 39°0.15
54 °
Peru, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.15 in
Chance of precipitation30%
Record high73° (1963)
Record low24° (1969)
Sun, 2553° / 40°0.16
53 °
Peru, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.16 in
Chance of precipitation37%
Record high75° (1963)
Record low27° (1981)
Mon, 2653° / 39°0.13
53 °
Peru, Monday, 26 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.13 in
Chance of precipitation35%
Record high75° (1963)
Record low26° (2018)
Tue, 2752° / 38°0.15
52 °
Peru, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.15 in
Chance of precipitation23%
Record high76° (1963)
Record low24° (1976)
Wed, 2852° / 37°0.21
52 °
Peru, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.21 in
Chance of precipitation30%
Record high72° (2023)
Record low24° (1976)
Thu, 2950° / 36°0.17
50 °
Peru, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.17 in
Chance of precipitation28%
Record high67° (1989)
Record low25° (1965)
Fri, 3050° / 36°0.18
50 °
Peru, Friday, 30 October
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.18 in
Chance of precipitation25%
Record high70° (2024)
Record low24° (2020)
Sat, 3151° / 36°0.09
51 °
Peru, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.09 in
Chance of precipitation23%
Record high72° (2024)
Record low16° (2011)
Sun, 0152° / 37°0.14
52 °
Peru, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.14 in
Chance of precipitation27%
Record high70° (1974)
Record low24° (2011)
Mon, 0252° / 37°0.13
52 °
Peru, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.13 in
Chance of precipitation32%
Record high72° (1982)
Record low22° (2011)
Tue, 0352° / 37°0.16
52 °
Peru, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.16 in
Chance of precipitation38%
Record high67° (2003)
Record low24° (1980)
Wed, 0450° / 36°0.06
50 °
Peru, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.06 in
Chance of precipitation27%
Record high69° (1994)
Record low25° (2013)
Thu, 0550° / 36°0.16
50 °
Peru, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.16 in
Chance of precipitation35%
Record high70° (1994)
Record low25° (1965)
Fri, 0649° / 36°0.13
49 °
Peru, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.13 in
Chance of precipitation42%
Record high70° (2024)
Record low24° (2012)
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 Peru, MA 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 Peru, MA 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.