As of 15:39 EDT

Weather in Perth, IN

80°Current weather

Perth, Thursday, 8 October, 15:39

Clear. Feels like 80°. High 80°, low 50°.

Pressure30.06 inHg
Wind6 mph W
Humidity34%
Visibility6.2 mi
Dew point49°

Monthly outlook for Perth, IN: average high 75.7°, average low 54.1°. That is 6° above the climate normal for October. Precipitation is expected on 4 days (about 1.0 inches), against a normal of 4 days and 1.7 inches. The warmest day looks like 15 October (93.9°), the coolest 18 October (40.4°).

75.7°/54.1°
Average high / low
+6°
Above normal
4 / 4
Wet days / normal
1.0 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
8 October – 17 October79.4°66.4°+7.2°
18 October – 27 October69.6°61.6°+4.4°
28 October – 6 Novemberat normal58.1°—

October records over 66 years

89.8°1 October 2019All-time high
23.4°26 October 1962All-time low

Climate normals and records are computed from the nearest reference point — Center Point (13 mi).

Fri, 0983° / 49°0Clear
83 °Clear

Perth, Friday, 9 October

Clear. High 83°, low 49°.

Pressure30.18 inHg
Wind5.5 mph S
Humidity43%
Visibility6.2 mi
Dew point51°
Sat, 1078° / 56°0Overcast
78 °Overcast

Perth, Saturday, 10 October

Overcast. High 78°, low 56°.

Pressure30.15 inHg
Wind6.2 mph SE
Humidity49%
Visibility6.2 mi
Dew point52°
Sun, 1169° / 59°0.26Rain
69 °Rain

Perth, Sunday, 11 October

Rain. High 69°, low 59°.

Pressure29.91 inHg
Wind5.5 mph NE
Humidity97%
Visibility2.7 mi
Dew point60°
Mon, 1283° / 55°0Clear
83 °Clear

Perth, Monday, 12 October

Clear. High 83°, low 55°.

Pressure29.97 inHg
Wind5.9 mph S
Humidity65%
Visibility6.2 mi
Dew point61°
Tue, 1387° / 68°0Clear
87 °Clear

Perth, Tuesday, 13 October

Clear. High 87°, low 68°.

Pressure29.85 inHg
Wind9.2 mph SW
Humidity41%
Visibility—
Dew point57°
Wed, 1479° / 57°0.01Light rain
79 °Light rain

Perth, Wednesday, 14 October

Light rain. High 79°, low 57°.

Pressure30.00 inHg
Wind14 mph SE
Humidity52%
Visibility—
Dew point52°
Thu, 1594° / 68°0Partly cloudy
94 °Partly cloudy

Perth, Thursday, 15 October

Partly cloudy. High 94°, low 68°.

Pressure29.94 inHg
Wind17.4 mph SW
Humidity37%
Visibility—
Dew point60°
Fri, 1680° / 58°0.58Rain
80 °Rain

Perth, Friday, 16 October

Rain. High 80°, low 58°.

Pressure30.18 inHg
Wind14.8 mph NW
Humidity73%
Visibility—
Dew point61°
Sat, 1761° / 47°0Clear
61 °Clear

Perth, Saturday, 17 October

Clear. High 61°, low 47°.

Pressure30.53 inHg
Wind16.6 mph NE
Humidity41%
Visibility—
Dew point35°
Sun, 1864° / 40°0Overcast
64 °Overcast

Perth, Sunday, 18 October

Overcast. High 64°, low 40°.

Pressure30.45 inHg
Wind11 mph E
Humidity29%
Visibility—
Dew point26°
Mon, 1965° / 50°0.02Light rain
65 °Light rain

Perth, Monday, 19 October

Light rain. High 65°, low 50°.

Pressure30.30 inHg
Wind13.5 mph S
Humidity79%
Visibility—
Dew point49°
Tue, 2074° / 59°0.03Light rain
74 °Light rain

Perth, Tuesday, 20 October

Light rain. High 74°, low 59°.

Pressure30.18 inHg
Wind13.2 mph S
Humidity60%
Visibility—
Dew point57°
Wed, 2177° / 56°0.05Light rain
77 °Light rain

Perth, Wednesday, 21 October

Light rain. High 77°, low 56°.

Pressure30.06 inHg
Wind9.8 mph SW
Humidity54%
Visibility—
Dew point55°
Thu, 2275° / 52°0.06Light rain
75 °Light rain

Perth, Thursday, 22 October

Light rain. High 75°, low 52°.

Pressure29.91 inHg
Wind18.1 mph SW
Humidity49%
Visibility—
Dew point52°
Fri, 2363° / 43°0Clear
63 °Clear

Perth, Friday, 23 October

Clear. High 63°, low 43°.

Pressure30.18 inHg
Wind10.5 mph W
Humidity36%
Visibility—
Dew point31°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2461° / 47°0.11Climate normal
61 °Climate normal

Perth, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high61°
Average low47°
Average precipitation0.11 in
Chance of precipitation30%
Record high77° (1963)
Record low26° (1981)
Sun, 2560° / 46°0.12Climate normal
60 °Climate normal

Perth, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high60°
Average low46°
Average precipitation0.12 in
Chance of precipitation23%
Record high78° (1963)
Record low29° (2013)
Mon, 2661° / 45°0.11Climate normal
61 °Climate normal

Perth, Monday, 26 October

Climate normal for this date — 60-year average.

Average high61°
Average low45°
Average precipitation0.11 in
Chance of precipitation30%
Record high80° (1963)
Record low23° (1962)
Tue, 2760° / 45°0.11Climate normal
60 °Climate normal

Perth, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high60°
Average low45°
Average precipitation0.11 in
Chance of precipitation32%
Record high77° (2023)
Record low30° (1962)
Wed, 2859° / 44°0.09Climate normal
59 °Climate normal

Perth, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high59°
Average low44°
Average precipitation0.09 in
Chance of precipitation30%
Record high74° (1999)
Record low28° (1976)
Thu, 2959° / 44°0.09Climate normal
59 °Climate normal

Perth, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high59°
Average low44°
Average precipitation0.09 in
Chance of precipitation23%
Record high77° (2024)
Record low28° (1976)
Fri, 3061° / 45°0.07Climate normal
61 °Climate normal

Perth, Friday, 30 October

Climate normal for this date — 60-year average.

Average high61°
Average low45°
Average precipitation0.07 in
Chance of precipitation30%
Record high76° (1971)
Record low31° (1980)
Sat, 3160° / 46°0.13Climate normal
60 °Climate normal

Perth, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high60°
Average low46°
Average precipitation0.13 in
Chance of precipitation40%
Record high75° (1974)
Record low27° (2023)
Sun, 0159° / 45°0.17Climate normal
59 °Climate normal

Perth, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high59°
Average low45°
Average precipitation0.17 in
Chance of precipitation33%
Record high76° (2016)
Record low27° (1993)
Mon, 0259° / 43°0.09Climate normal
59 °Climate normal

Perth, Monday, 2 November

Climate normal for this date — 60-year average.

Average high59°
Average low43°
Average precipitation0.09 in
Chance of precipitation28%
Record high78° (1961)
Record low26° (2020)
Tue, 0357° / 42°0.06Climate normal
57 °Climate normal

Perth, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high57°
Average low42°
Average precipitation0.06 in
Chance of precipitation27%
Record high75° (2003)
Record low23° (1991)
Wed, 0456° / 43°0.09Climate normal
56 °Climate normal

Perth, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high56°
Average low43°
Average precipitation0.09 in
Chance of precipitation28%
Record high75° (2003)
Record low20° (1991)
Thu, 0556° / 42°0.11Climate normal
56 °Climate normal

Perth, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high56°
Average low42°
Average precipitation0.11 in
Chance of precipitation27%
Record high75° (1975)
Record low20° (1991)
Fri, 0655° / 40°0.08Climate normal
55 °Climate normal

Perth, Friday, 6 November

Climate normal for this date — 60-year average.

Average high55°
Average low40°
Average precipitation0.08 in
Chance of precipitation33%
Record high71° (2023)
Record low27° (1967)

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 Perth, IN 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 Perth, IN 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.