As of 10:46 PDT

Weather in Union, CA

64°

Union, Saturday, 10 October, 10:46

Clear. Feels like 63°. High 69°, low 50°.

Pressure29.65 inHg

Wind4.3 mph SW

Humidity71%

Visibility6.2 mi

Dew point54°

See detailed hourly forecast

Monthly outlook for Union, CA: average high 82.4°, average low 54.1°. That is 4.1° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.8 inches. The warmest day looks like 16 October (93°), the coolest 11 October (44.8°).

82.4°/54.1°

Average high / low

+4.1°

Above normal

0 / 2

Wet days / normal

0.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
10 October – 19 October	80.1°	76.2°	+2.2°
20 October – 29 October	86.2°	72.1°	+7.8°
30 October – 8 November	at normal	68.6°	—

October records over 66 years

103.3°1 October 2020All-time high

38.3°28 October 2023All-time low

Climate normals and records are computed from the nearest reference point — Fetters Hot Springs (10 mi).

Sun, 1168° / 45°

68 °

Union, Sunday, 11 October

Clear. High 68°, low 45°.

Pressure29.53 inHg

Wind4.6 mph SW

Humidity35%

Visibility6.2 mi

Dew point40°

Mon, 1272° / 45°

72 °

Union, Monday, 12 October

Clear. High 72°, low 45°.

Pressure29.85 inHg

Wind5.3 mph N

Humidity26%

Visibility6.2 mi

Dew point31°

Tue, 1375° / 47°

75 °

Union, Tuesday, 13 October

Clear. High 75°, low 47°.

Pressure30.03 inHg

Wind9.3 mph N

Humidity21%

Visibility6.2 mi

Dew point24°

Wed, 1477° / 50°

77 °

Union, Wednesday, 14 October

Partly cloudy. High 77°, low 50°.

Pressure30.12 inHg

Wind6.8 mph SW

Humidity30%

Visibility—

Dew point33°

Thu, 1587° / 50°

87 °

Union, Thursday, 15 October

Clear. High 87°, low 50°.

Pressure30.09 inHg

Wind4.8 mph S

Humidity26%

Visibility—

Dew point35°

Fri, 1693° / 61°

93 °

Union, Friday, 16 October

Clear. High 93°, low 61°.

Pressure30.09 inHg

Wind5.7 mph SW

Humidity17%

Visibility—

Dew point32°

Sat, 1793° / 64°

93 °

Union, Saturday, 17 October

Mostly clear. High 93°, low 64°.

Pressure30.03 inHg

Wind5.8 mph SW

Humidity16%

Visibility—

Dew point32°

Sun, 1885° / 57°

85 °

Union, Sunday, 18 October

Overcast. High 85°, low 57°.

Pressure30.00 inHg

Wind4.7 mph SW

Humidity28%

Visibility—

Dew point40°

Mon, 1983° / 53°

83 °

Union, Monday, 19 October

Mostly clear. High 83°, low 53°.

Pressure30.03 inHg

Wind6.4 mph SW

Humidity33%

Visibility—

Dew point41°

Tue, 2089° / 56°

89 °

Union, Tuesday, 20 October

Clear. High 89°, low 56°.

Pressure30.00 inHg

Wind5.4 mph SW

Humidity16%

Visibility—

Dew point28°

Wed, 2191° / 62°

91 °

Union, Wednesday, 21 October

Mostly clear. High 91°, low 62°.

Pressure29.97 inHg

Wind4.6 mph S

Humidity14%

Visibility—

Dew point26°

Thu, 2285° / 60°

85 °

Union, Thursday, 22 October

Partly cloudy. High 85°, low 60°.

Pressure29.88 inHg

Wind7.3 mph SW

Humidity17%

Visibility—

Dew point29°

Fri, 2376° / 54°

76 °

Union, Friday, 23 October

Overcast. High 76°, low 54°.

Pressure29.97 inHg

Wind6.4 mph SW

Humidity53%

Visibility—

Dew point50°

Sat, 2484° / 53°

84 °

Union, Saturday, 24 October

Mostly clear. High 84°, low 53°.

Pressure30.06 inHg

Wind4.6 mph NW

Humidity28%

Visibility—

Dew point38°

Sun, 2592° / 61°

92 °

Union, Sunday, 25 October

Partly cloudy. High 92°, low 61°.

Pressure30.03 inHg

Wind4.7 mph SW

Humidity17%

Visibility—

Dew point31°

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

Mon, 2672° / 51°

0.06

72 °

Union, Monday, 26 October

Climate normal for this date — 60-year average.

Average high72°

Average low51°

Average precipitation0.06 in

Chance of precipitation13%

Record high92° (2003)

Record low40° (2023)

Tue, 2771° / 51°

0.04

71 °

Union, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high71°

Average low51°

Average precipitation0.04 in

Chance of precipitation7%

Record high91° (2003)

Record low40° (2023)

Wed, 2870° / 50°

0.08

70 °

Union, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high70°

Average low50°

Average precipitation0.08 in

Chance of precipitation18%

Record high90° (2003)

Record low38° (2023)

Thu, 2970° / 49°

0.07

70 °

Union, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high70°

Average low49°

Average precipitation0.07 in

Chance of precipitation22%

Record high83° (1965)

Record low40° (1971)

Fri, 3069° / 49°

0.06

69 °

Union, Friday, 30 October

Climate normal for this date — 60-year average.

Average high69°

Average low49°

Average precipitation0.06 in

Chance of precipitation18%

Record high85° (1966)

Record low40° (2023)

Sat, 3170° / 49°

0.04

70 °

Union, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high70°

Average low49°

Average precipitation0.04 in

Chance of precipitation17%

Record high87° (1966)

Record low39° (2023)

Sun, 0170° / 49°

0.07

70 °

Union, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high70°

Average low49°

Average precipitation0.07 in

Chance of precipitation15%

Record high86° (1967)

Record low37° (2003)

Mon, 0270° / 49°

0.05

70 °

Union, Monday, 2 November

Climate normal for this date — 60-year average.

Average high70°

Average low49°

Average precipitation0.05 in

Chance of precipitation13%

Record high86° (1967)

Record low41° (1974)

Tue, 0370° / 49°

0.04

70 °

Union, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high70°

Average low49°

Average precipitation0.04 in

Chance of precipitation13%

Record high85° (2018)

Record low37° (2022)

Wed, 0469° / 49°

0.03

69 °

Union, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high69°

Average low49°

Average precipitation0.03 in

Chance of precipitation12%

Record high83° (1976)

Record low40° (1973)

Thu, 0568° / 49°

0.08

68 °

Union, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high68°

Average low49°

Average precipitation0.08 in

Chance of precipitation15%

Record high83° (2020)

Record low41° (2004)

Fri, 0667° / 50°

0.07

67 °

Union, Friday, 6 November

Climate normal for this date — 60-year average.

Average high67°

Average low50°

Average precipitation0.07 in

Chance of precipitation20%

Record high81° (1976)

Record low41° (1972)

Sat, 0767° / 49°

0.1

67 °

Union, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high67°

Average low49°

Average precipitation0.1 in

Chance of precipitation23%

Record high82° (1991)

Record low40° (2022)

Sun, 0866° / 48°

0.09

66 °

Union, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high66°

Average low48°

Average precipitation0.09 in

Chance of precipitation23%

Record high79° (1978)

Record low40° (1983)

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 Union, CA 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 Union, CA 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.