As of 09:36 MST

Weather in Williamson, AZ

74°

Williamson, Thursday, 8 October, 09:36

Clear. Feels like 73°. High 87°, low 60°.

Pressure29.97 inHg

Wind3 mph N

Humidity38%

Visibility6.2 mi

Dew point47°

See detailed hourly forecast

Monthly outlook for Williamson, AZ: average high 70.2°, average low 50.1°. That is 0.5° below the climate normal for October. Precipitation is expected on 4 days (about 1.6 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 8 October (87.2°), the coolest 18 October (40.8°).

70.2°/50.1°

Average high / low

−0.5°

Below normal

4 / 2

Wet days / normal

1.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	68.7°	72.3°	-2°
18 October – 27 October	72.8°	68.4°	+2.4°
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 mph SE

Humidity18%

Visibility6.2 mi

Dew point37°

Sat, 1076° / 61°

0.07

76 °

Williamson, Saturday, 10 October

Light rain. High 76°, low 61°.

Pressure29.80 inHg

Wind12.3 mph S

Humidity48%

Visibility2.8 mi

Dew point51°

Sun, 1167° / 58°

1.2

67 °

Williamson, Sunday, 11 October

Rain. High 67°, low 58°.

Pressure29.62 inHg

Wind19 mph SE

Humidity77%

Visibility2.0 mi

Dew point57°

Mon, 1263° / 53°

0.2

63 °

Williamson, Monday, 12 October

Light rain. High 63°, low 53°.

Pressure29.83 inHg

Wind19.3 mph S

Humidity70%

Visibility—

Dew point53°

Tue, 1358° / 45°

0.09

58 °

Williamson, Tuesday, 13 October

Light rain. High 58°, low 45°.

Pressure29.88 inHg

Wind15.2 mph SW

Humidity66%

Visibility—

Dew point46°

Wed, 1458° / 42°

58 °

Williamson, Wednesday, 14 October

Clear. High 58°, low 42°.

Pressure29.94 inHg

Wind11.1 mph SW

Humidity43%

Visibility—

Dew point31°

Thu, 1565° / 44°

65 °

Williamson, Thursday, 15 October

Clear. High 65°, low 44°.

Pressure30.00 inHg

Wind13.2 mph W

Humidity39%

Visibility—

Dew point33°

Fri, 1662° / 46°

62 °

Williamson, Friday, 16 October

Partly cloudy. High 62°, low 46°.

Pressure30.00 inHg

Wind5.5 mph NW

Humidity40%

Visibility—

Dew point33°

Sat, 1764° / 43°

64 °

Williamson, Saturday, 17 October

Clear. High 64°, low 43°.

Pressure30.03 inHg

Wind15.9 mph SW

Humidity41%

Visibility—

Dew point33°

Sun, 1866° / 41°

66 °

Williamson, Sunday, 18 October

Clear. High 66°, low 41°.

Pressure30.15 inHg

Wind8.1 mph NE

Humidity32%

Visibility—

Dew point27°

Mon, 1971° / 45°

71 °

Williamson, Monday, 19 October

Clear. High 71°, low 45°.

Pressure30.12 inHg

Wind6.5 mph NE

Humidity29%

Visibility—

Dew point29°

Tue, 2075° / 50°

75 °

Williamson, Tuesday, 20 October

Clear. High 75°, low 50°.

Pressure30.12 inHg

Wind7.9 mph NE

Humidity29%

Visibility—

Dew point32°

Wed, 2175° / 51°

75 °

Williamson, Wednesday, 21 October

Clear. High 75°, low 51°.

Pressure30.12 inHg

Wind5.3 mph NE

Humidity24%

Visibility—

Dew point29°

Thu, 2276° / 51°

76 °

Williamson, Thursday, 22 October

Clear. High 76°, low 51°.

Pressure30.03 inHg

Wind9.5 mph SW

Humidity16%

Visibility—

Dew point19°

Fri, 2373° / 54°

73 °

Williamson, Friday, 23 October

Clear. High 73°, low 54°.

Pressure29.80 inHg

Wind22.2 mph SW

Humidity27%

Visibility—

Dew point35°

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.