As of 23:25 MST

Weather in Williamson, AZ

65°

Williamson, Thursday, 8 October, 23:25

Clear. Feels like 64°. High 87°, low 59°.

Pressure29.88 inHg

Wind2.1 mph S

Humidity48%

Visibility6.2 mi

Dew point46°

See detailed hourly forecast

Monthly outlook for Williamson, AZ: average high 68.8°, average low 49.4°. That is 1.3° below the climate normal for October. Precipitation is expected on 4 days (about 0.8 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 8 October (86.5°), the coolest 14 October (40.7°).

68.8°/49.4°

Average high / low

−1.3°

Below normal

4 / 2

Wet days / normal

0.8 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	68.5°	72.3°	-2.1°
18 October – 27 October	69.4°	68.4°	+0.5°
28 October – 6 November	at normal	64.7°	—

October records over 66 years

94.8°1 October 2024All-time high

20.8°31 October 2019All-time low

Fri, 0986° / 57°

86 °

Williamson, Friday, 9 October

Partly cloudy. High 86°, low 57°.

Pressure29.83 inHg

Wind4.7 mph SE

Humidity20%

Visibility6.2 mi

Dew point39°

Sat, 1079° / 58°

0.09

79 °

Williamson, Saturday, 10 October

Light rain. High 79°, low 58°.

Pressure29.74 inHg

Wind9 mph S

Humidity33%

Visibility6.2 mi

Dew point47°

Sun, 1166° / 56°

0.31

66 °

Williamson, Sunday, 11 October

Rain. High 66°, low 56°.

Pressure29.65 inHg

Wind23.3 mph S

Humidity73%

Visibility4.4 mi

Dew point55°

Mon, 1262° / 54°

0.2

62 °

Williamson, Monday, 12 October

Light rain. High 62°, low 54°.

Pressure29.88 inHg

Wind16.6 mph S

Humidity77%

Visibility4.8 mi

Dew point53°

Tue, 1357° / 43°

0.19

57 °

Williamson, Tuesday, 13 October

Light rain. High 57°, low 43°.

Pressure29.94 inHg

Wind18.6 mph SW

Humidity80%

Visibility—

Dew point48°

Wed, 1461° / 41°

61 °

Williamson, Wednesday, 14 October

Clear. High 61°, low 41°.

Pressure30.09 inHg

Wind8.3 mph W

Humidity53%

Visibility—

Dew point37°

Thu, 1566° / 45°

66 °

Williamson, Thursday, 15 October

Clear. High 66°, low 45°.

Pressure29.94 inHg

Wind16.5 mph SW

Humidity37%

Visibility—

Dew point32°

Fri, 1662° / 44°

62 °

Williamson, Friday, 16 October

Clear. High 62°, low 44°.

Pressure30.03 inHg

Wind23.5 mph NE

Humidity32%

Visibility—

Dew point26°

Sat, 1761° / 44°

61 °

Williamson, Saturday, 17 October

Clear. High 61°, low 44°.

Pressure30.18 inHg

Wind26.8 mph NE

Humidity39%

Visibility—

Dew point30°

Sun, 1862° / 43°

62 °

Williamson, Sunday, 18 October

Clear. High 62°, low 43°.

Pressure30.15 inHg

Wind7 mph NE

Humidity40%

Visibility—

Dew point31°

Mon, 1967° / 46°

67 °

Williamson, Monday, 19 October

Clear. High 67°, low 46°.

Pressure30.12 inHg

Wind6.7 mph NE

Humidity28%

Visibility—

Dew point26°

Tue, 2069° / 47°

69 °

Williamson, Tuesday, 20 October

Clear. High 69°, low 47°.

Pressure30.06 inHg

Wind5.2 mph NE

Humidity29%

Visibility—

Dew point29°

Wed, 2170° / 50°

70 °

Williamson, Wednesday, 21 October

Clear. High 70°, low 50°.

Pressure30.03 inHg

Wind4.3 mph N

Humidity30%

Visibility—

Dew point31°

Thu, 2273° / 51°

73 °

Williamson, Thursday, 22 October

Clear. High 73°, low 51°.

Pressure30.09 inHg

Wind8.9 mph E

Humidity29%

Visibility—

Dew point33°

Fri, 2375° / 53°

75 °

Williamson, Friday, 23 October

Mostly clear. High 75°, low 53°.

Pressure30.06 inHg

Wind10.8 mph SE

Humidity35%

Visibility—

Dew point39°

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

Sat, 2468° / 45°

0.06

68 °

Williamson, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high68°

Average low45°

Average precipitation0.06 in

Chance of precipitation10%

Record high80° (2003)

Record low28° (1975)

Sun, 2568° / 45°

0.04

68 °

Williamson, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high68°

Average low45°

Average precipitation0.04 in

Chance of precipitation12%

Record high78° (1988)

Record low29° (1975)

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)

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.