As of 11:25 MST

Weather in Williamson, AZ

74°

Williamson, Saturday, 10 October, 11:25

Overcast. Feels like 73°. High 74°, low 53°.

Pressure29.85 inHg

Wind15 mph SE

Humidity44%

Visibility6.2 mi

Dew point51°

See detailed hourly forecast

Monthly outlook for Williamson, AZ: average high 71.1°, average low 52.3°. That is 0.4° above the climate normal for October. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 25 October (77.6°), the coolest 14 October (42.1°).

71.1°/52.3°

Average high / low

+0.4°

Above normal

4 / 2

Wet days / normal

1.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
10 October – 19 October	68.9°	71.7°	-1.6°
20 October – 29 October	74.9°	67.4°	+4.2°
30 October – 8 November	at normal	64.2°	—

October records over 66 years

94.8°1 October 2024All-time high

20.8°31 October 2019All-time low

Sun, 1163° / 49°

0.48

63 °

Williamson, Sunday, 11 October

Rain. High 63°, low 49°.

Pressure29.71 inHg

Wind19.6 mph S

Humidity72%

Visibility3.2 mi

Dew point54°

Mon, 1264° / 51°

0.32

64 °

Williamson, Monday, 12 October

Rain. High 64°, low 51°.

Pressure29.85 inHg

Wind18.8 mph S

Humidity69%

Visibility6.1 mi

Dew point52°

Tue, 1361° / 50°

0.12

61 °

Williamson, Tuesday, 13 October

Light rain. High 61°, low 50°.

Pressure29.94 inHg

Wind15.9 mph SW

Humidity60%

Visibility6.2 mi

Dew point45°

Wed, 1461° / 42°

61 °

Williamson, Wednesday, 14 October

Clear. High 61°, low 42°.

Pressure30.06 inHg

Wind4.9 mph NW

Humidity62%

Visibility—

Dew point41°

Thu, 1567° / 44°

67 °

Williamson, Thursday, 15 October

Clear. High 67°, low 44°.

Pressure30.09 inHg

Wind8.2 mph NE

Humidity50%

Visibility—

Dew point40°

Fri, 1675° / 48°

75 °

Williamson, Friday, 16 October

Clear. High 75°, low 48°.

Pressure30.12 inHg

Wind10.8 mph NE

Humidity23%

Visibility—

Dew point27°

Sat, 1776° / 55°

76 °

Williamson, Saturday, 17 October

Clear. High 76°, low 55°.

Pressure30.15 inHg

Wind6.1 mph E

Humidity34%

Visibility—

Dew point39°

Sun, 1876° / 57°

76 °

Williamson, Sunday, 18 October

Clear. High 76°, low 57°.

Pressure30.09 inHg

Wind12.1 mph W

Humidity35%

Visibility—

Dew point40°

Mon, 1971° / 57°

71 °

Williamson, Monday, 19 October

Overcast. High 71°, low 57°.

Pressure30.00 inHg

Wind12 mph SW

Humidity39%

Visibility—

Dew point42°

Tue, 2074° / 53°

74 °

Williamson, Tuesday, 20 October

Overcast. High 74°, low 53°.

Pressure29.97 inHg

Wind7.3 mph N

Humidity38%

Visibility—

Dew point40°

Wed, 2175° / 53°

75 °

Williamson, Wednesday, 21 October

Clear. High 75°, low 53°.

Pressure30.03 inHg

Wind4.4 mph SW

Humidity28%

Visibility—

Dew point33°

Thu, 2276° / 56°

76 °

Williamson, Thursday, 22 October

Clear. High 76°, low 56°.

Pressure30.00 inHg

Wind7.1 mph SW

Humidity28%

Visibility—

Dew point36°

Fri, 2375° / 58°

0.01

75 °

Williamson, Friday, 23 October

Light rain. High 75°, low 58°.

Pressure29.97 inHg

Wind6.8 mph S

Humidity36%

Visibility—

Dew point42°

Sat, 2472° / 56°

72 °

Williamson, Saturday, 24 October

Overcast. High 72°, low 56°.

Pressure30.03 inHg

Wind4.2 mph SW

Humidity37%

Visibility—

Dew point42°

Sun, 2578° / 56°

78 °

Williamson, Sunday, 25 October

Clear. High 78°, low 56°.

Pressure30.06 inHg

Wind14.9 mph E

Humidity25%

Visibility—

Dew point33°

From day 17 onward the outlook is built from 60-year climate statistics

Mon, 2667° / 43°

0.03

67 °

Williamson, Monday, 26 October

Climate normal for this date — 60-year average.

Average high67°

Average low43°

Average precipitation0.03 in

Chance of precipitation13%

Record high83° (2008)

Record low29° (1997)

Tue, 2766° / 43°

0.04

66 °

Williamson, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high66°

Average low43°

Average precipitation0.04 in

Chance of precipitation12%

Record high80° (2008)

Record low27° (2020)

Wed, 2866° / 43°

0.05

66 °

Williamson, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high66°

Average low43°

Average precipitation0.05 in

Chance of precipitation10%

Record high80° (2008)

Record low26° (1970)

Thu, 2965° / 43°

0.04

65 °

Williamson, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high65°

Average low43°

Average precipitation0.04 in

Chance of precipitation13%

Record high79° (2008)

Record low24° (1971)

Fri, 3064° / 41°

0.02

64 °

Williamson, Friday, 30 October

Climate normal for this date — 60-year average.

Average high64°

Average low41°

Average precipitation0.02 in

Chance of precipitation8%

Record high77° (2014)

Record low23° (1971)

Sat, 3164° / 40°

0.01

64 °

Williamson, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high64°

Average low40°

Average precipitation0.01 in

Chance of precipitation8%

Record high76° (1988)

Record low21° (2019)

Sun, 0165° / 40°

0.04

65 °

Williamson, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high65°

Average low40°

Average precipitation0.04 in

Chance of precipitation7%

Record high78° (2020)

Record low24° (1971)

Mon, 0265° / 40°

0.02

65 °

Williamson, Monday, 2 November

Climate normal for this date — 60-year average.

Average high65°

Average low40°

Average precipitation0.02 in

Chance of precipitation8%

Record high78° (2025)

Record low26° (2004)

Tue, 0365° / 40°

0.02

65 °

Williamson, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high65°

Average low40°

Average precipitation0.02 in

Chance of precipitation15%

Record high79° (2009)

Record low28° (1971)

Wed, 0465° / 40°

0.01

65 °

Williamson, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high65°

Average low40°

Average precipitation0.01 in

Chance of precipitation5%

Record high79° (1988)

Record low26° (2022)

Thu, 0565° / 41°

0.02

65 °

Williamson, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high65°

Average low41°

Average precipitation0.02 in

Chance of precipitation5%

Record high78° (2020)

Record low29° (1974)

Fri, 0664° / 40°

0.01

64 °

Williamson, Friday, 6 November

Climate normal for this date — 60-year average.

Average high64°

Average low40°

Average precipitation0.01 in

Chance of precipitation7%

Record high77° (2007)

Record low29° (2015)

Sat, 0763° / 40°

0.01

63 °

Williamson, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high63°

Average low40°

Average precipitation0.01 in

Chance of precipitation5%

Record high77° (2006)

Record low28° (2015)

Sun, 0862° / 40°

0.03

62 °

Williamson, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high62°

Average low40°

Average precipitation0.03 in

Chance of precipitation13%

Record high75° (2006)

Record low26° (2000)

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 Williamson, AZ 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 Williamson, AZ 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.