As of 12:49 MDT

Weather in Altvan, WY

94°

Altvan, Saturday, 8 August, 12:49

Clear. Feels like 89°. High 94°, low 62°.

Pressure29.80 inHg

Wind22 mph N

Humidity12%

Visibility6.2 mi

Dew point34°

See detailed hourly forecast

Monthly outlook for Altvan, WY: average high 87.1°, average low 63.1°. That is 4.2° above the climate normal for August. Precipitation is expected on 8 days (about 2.4 inches), against a normal of 5 days and 0.7 inches. The warmest day looks like 8 August (94.4°), the coolest 10 August (58.7°).

87.1°/63.1°

Average high / low

+4.2°

Above normal

8 / 5

Wet days / normal

2.4 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	88.9°	79.6°	+5.2°
18 August – 27 August	84.1°	79.6°	+2.5°
28 August – 6 September	at normal	78°	—

August records over 66 years

95.4°8 August 1969All-time high

40.1°27 August 1992All-time low

Climate normals and records are computed from the nearest reference point — Cheyenne (5 mi).

Sun, 0992° / 63°

0.06

92 °

Altvan, Sunday, 9 August

Rain. High 92°, low 63°.

Pressure29.77 inHg

Wind10.5 mph NW

Humidity11%

Visibility6.2 mi

Dew point32°

Mon, 1094° / 59°

94 °

Altvan, Monday, 10 August

Mostly clear. High 94°, low 59°.

Pressure29.80 inHg

Wind13.2 mph N

Humidity14%

Visibility6.2 mi

Dew point36°

Tue, 1194° / 70°

0.01

94 °

Altvan, Tuesday, 11 August

Light rain. High 94°, low 70°.

Pressure29.80 inHg

Wind12.3 mph NW

Humidity11%

Visibility6.2 mi

Dew point32°

Wed, 1293° / 64°

93 °

Altvan, Wednesday, 12 August

Overcast. High 93°, low 64°.

Pressure29.77 inHg

Wind12.9 mph S

Humidity21%

Visibility6.2 mi

Dew point44°

Thu, 1382° / 62°

0.92

82 °

Altvan, Thursday, 13 August

Heavy rain. High 82°, low 62°.

Pressure29.94 inHg

Wind25.5 mph SE

Humidity48%

Visibility—

Dew point53°

Fri, 1477° / 61°

0.54

77 °

Altvan, Friday, 14 August

Heavy rain. High 77°, low 61°.

Pressure30.00 inHg

Wind19.6 mph S

Humidity67%

Visibility—

Dew point58°

Sat, 1583° / 64°

0.13

83 °

Altvan, Saturday, 15 August

Light rain. High 83°, low 64°.

Pressure30.00 inHg

Wind12.2 mph N

Humidity37%

Visibility—

Dew point50°

Sun, 1689° / 64°

0.01

89 °

Altvan, Sunday, 16 August

Light rain. High 89°, low 64°.

Pressure30.00 inHg

Wind10.8 mph NW

Humidity22%

Visibility—

Dew point41°

Mon, 1790° / 67°

0.06

90 °

Altvan, Monday, 17 August

Light rain. High 90°, low 67°.

Pressure30.00 inHg

Wind15.2 mph SW

Humidity26%

Visibility—

Dew point46°

Tue, 1887° / 64°

87 °

Altvan, Tuesday, 18 August

Overcast. High 87°, low 64°.

Pressure30.00 inHg

Wind14.1 mph SE

Humidity28%

Visibility—

Dew point45°

Wed, 1989° / 66°

0.05

89 °

Altvan, Wednesday, 19 August

Light rain. High 89°, low 66°.

Pressure29.88 inHg

Wind18.9 mph NW

Humidity28%

Visibility—

Dew point46°

Thu, 2074° / 62°

0.48

74 °

Altvan, Thursday, 20 August

Rain. High 74°, low 62°.

Pressure30.00 inHg

Wind17.2 mph W

Humidity53%

Visibility—

Dew point55°

Fri, 2188° / 60°

88 °

Altvan, Friday, 21 August

Clear. High 88°, low 60°.

Pressure29.91 inHg

Wind14.3 mph S

Humidity30%

Visibility—

Dew point46°

Sat, 2281° / 63°

0.19

81 °

Altvan, Saturday, 22 August

Rain. High 81°, low 63°.

Pressure29.97 inHg

Wind20.8 mph E

Humidity34%

Visibility—

Dew point49°

Sun, 2384° / 59°

84 °

Altvan, Sunday, 23 August

Partly cloudy. High 84°, low 59°.

Pressure30.00 inHg

Wind9.7 mph SE

Humidity44%

Visibility—

Dew point52°

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

Mon, 2480° / 56°

0.08

80 °

Altvan, Monday, 24 August

Climate normal for this date — 60-year average.

Average high80°

Average low56°

Average precipitation0.08 in

Chance of precipitation17%

Record high91° (2020)

Record low47° (1966)

Tue, 2580° / 56°

0.03

80 °

Altvan, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high80°

Average low56°

Average precipitation0.03 in

Chance of precipitation23%

Record high91° (2011)

Record low43° (1972)

Wed, 2680° / 56°

0.04

80 °

Altvan, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high80°

Average low56°

Average precipitation0.04 in

Chance of precipitation30%

Record high90° (1994)

Record low46° (1979)

Thu, 2779° / 56°

0.05

79 °

Altvan, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high79°

Average low56°

Average precipitation0.05 in

Chance of precipitation27%

Record high90° (2020)

Record low40° (1992)

Fri, 2879° / 55°

0.04

79 °

Altvan, Friday, 28 August

Climate normal for this date — 60-year average.

Average high79°

Average low55°

Average precipitation0.04 in

Chance of precipitation22%

Record high90° (2012)

Record low41° (2004)

Sat, 2979° / 55°

0.04

79 °

Altvan, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high79°

Average low55°

Average precipitation0.04 in

Chance of precipitation25%

Record high91° (2012)

Record low46° (2006)

Sun, 3079° / 55°

0.03

79 °

Altvan, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high79°

Average low55°

Average precipitation0.03 in

Chance of precipitation20%

Record high91° (1985)

Record low44° (1964)

Mon, 3178° / 55°

0.03

78 °

Altvan, Monday, 31 August

Climate normal for this date — 60-year average.

Average high78°

Average low55°

Average precipitation0.03 in

Chance of precipitation22%

Record high91° (1960)

Record low42° (1962)

Tue, 0178° / 54°

0.04

78 °

Altvan, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high78°

Average low54°

Average precipitation0.04 in

Chance of precipitation22%

Record high91° (1995)

Record low42° (1965)

Wed, 0278° / 54°

0.04

78 °

Altvan, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high78°

Average low54°

Average precipitation0.04 in

Chance of precipitation25%

Record high92° (2019)

Record low38° (1974)

Thu, 0378° / 54°

0.03

78 °

Altvan, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high78°

Average low54°

Average precipitation0.03 in

Chance of precipitation18%

Record high90° (2017)

Record low37° (1961)

Fri, 0477° / 53°

0.04

77 °

Altvan, Friday, 4 September

Climate normal for this date — 60-year average.

Average high77°

Average low53°

Average precipitation0.04 in

Chance of precipitation20%

Record high93° (2022)

Record low39° (1961)

Sat, 0578° / 53°

0.04

78 °

Altvan, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high78°

Average low53°

Average precipitation0.04 in

Chance of precipitation18%

Record high93° (2022)

Record low39° (1968)

Sun, 0677° / 53°

0.03

77 °

Altvan, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high77°

Average low53°

Average precipitation0.03 in

Chance of precipitation18%

Record high92° (2020)

Record low42° (1968)

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 Altvan, WY 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 Altvan, WY 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.