As of 23:01 MDT

Weather in Marnett, CO

75°

Marnett, Saturday, 8 August, 23:01

Partly cloudy. Feels like 74°. High 98°, low 67°.

Pressure29.80 inHg

Wind3 mph SW

Humidity32%

Visibility6.2 mi

Dew point43°

See detailed hourly forecast

Monthly outlook for Marnett, CO: average high 90.3°, average low 63.4°. That is 4.4° above the climate normal for August. Precipitation is expected on 9 days (about 1.6 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 12 August (99.4°), the coolest 16 August (58.8°).

90.3°/63.4°

Average high / low

+4.4°

Above normal

9 / 4

Wet days / normal

1.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	91.3°	82.5°	+4.9°
18 August – 27 August	88.6°	82.3°	+3.5°
28 August – 6 September	at normal	81°	—

August records over 66 years

98.8°7 August 2025All-time high

41.7°28 August 2004All-time low

Climate normals and records are computed from the nearest reference point — Longmont (2 mi).

Sun, 0996° / 65°

0.08

96 °

Marnett, Sunday, 9 August

Light rain. High 96°, low 65°.

Pressure29.74 inHg

Wind4.5 mph E

Humidity10%

Visibility6.2 mi

Dew point33°

Mon, 1096° / 62°

0.1

96 °

Marnett, Monday, 10 August

Rain. High 96°, low 62°.

Pressure29.80 inHg

Wind8.7 mph SE

Humidity16%

Visibility6.2 mi

Dew point42°

Tue, 1199° / 66°

99 °

Marnett, Tuesday, 11 August

Light rain. High 99°, low 66°.

Pressure29.77 inHg

Wind7.7 mph E

Humidity13%

Visibility6.2 mi

Dew point39°

Wed, 1299° / 66°

0.01

99 °

Marnett, Wednesday, 12 August

Light rain. High 99°, low 66°.

Pressure29.74 inHg

Wind4.8 mph E

Humidity17%

Visibility6.2 mi

Dew point41°

Thu, 1387° / 64°

0.3

87 °

Marnett, Thursday, 13 August

Rain. High 87°, low 64°.

Pressure29.80 inHg

Wind14.1 mph W

Humidity34%

Visibility—

Dew point50°

Fri, 1481° / 63°

0.11

81 °

Marnett, Friday, 14 August

Light rain. High 81°, low 63°.

Pressure30.00 inHg

Wind7 mph S

Humidity83%

Visibility—

Dew point60°

Sat, 1581° / 62°

0.31

81 °

Marnett, Saturday, 15 August

Rain. High 81°, low 62°.

Pressure30.09 inHg

Wind8.1 mph NW

Humidity55%

Visibility—

Dew point58°

Sun, 1686° / 59°

0.05

86 °

Marnett, Sunday, 16 August

Light rain. High 86°, low 59°.

Pressure30.03 inHg

Wind10.5 mph SW

Humidity44%

Visibility—

Dew point53°

Mon, 1790° / 63°

90 °

Marnett, Monday, 17 August

Mostly clear. High 90°, low 63°.

Pressure29.97 inHg

Wind9.4 mph SE

Humidity24%

Visibility—

Dew point44°

Tue, 1897° / 63°

97 °

Marnett, Tuesday, 18 August

Clear. High 97°, low 63°.

Pressure29.94 inHg

Wind12 mph SE

Humidity21%

Visibility—

Dew point43°

Wed, 1979° / 63°

0.48

79 °

Marnett, Wednesday, 19 August

Rain. High 79°, low 63°.

Pressure30.00 inHg

Wind16.2 mph NW

Humidity40%

Visibility—

Dew point50°

Thu, 2082° / 64°

0.08

82 °

Marnett, Thursday, 20 August

Light rain. High 82°, low 64°.

Pressure29.97 inHg

Wind15.5 mph NE

Humidity65%

Visibility—

Dew point58°

Fri, 2189° / 62°

0.1

89 °

Marnett, Friday, 21 August

Light rain. High 89°, low 62°.

Pressure29.71 inHg

Wind12.1 mph W

Humidity29%

Visibility—

Dew point48°

Sat, 2292° / 62°

92 °

Marnett, Saturday, 22 August

Partly cloudy. High 92°, low 62°.

Pressure29.83 inHg

Wind11.5 mph SE

Humidity20%

Visibility—

Dew point38°

Sun, 2393° / 61°

93 °

Marnett, Sunday, 23 August

Partly cloudy. High 93°, low 61°.

Pressure29.83 inHg

Wind9.9 mph SE

Humidity24%

Visibility—

Dew point43°

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

Mon, 2482° / 57°

0.06

82 °

Marnett, Monday, 24 August

Climate normal for this date — 60-year average.

Average high82°

Average low57°

Average precipitation0.06 in

Chance of precipitation22%

Record high96° (2020)

Record low47° (1968)

Tue, 2582° / 56°

0.04

82 °

Marnett, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°

Average low56°

Average precipitation0.04 in

Chance of precipitation8%

Record high95° (2020)

Record low48° (1964)

Wed, 2682° / 56°

0.06

82 °

Marnett, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high82°

Average low56°

Average precipitation0.06 in

Chance of precipitation28%

Record high92° (2007)

Record low48° (1992)

Thu, 2782° / 57°

0.05

82 °

Marnett, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high82°

Average low57°

Average precipitation0.05 in

Chance of precipitation20%

Record high94° (2020)

Record low43° (1992)

Fri, 2882° / 56°

0.02

82 °

Marnett, Friday, 28 August

Climate normal for this date — 60-year average.

Average high82°

Average low56°

Average precipitation0.02 in

Chance of precipitation17%

Record high92° (2011)

Record low42° (2004)

Sat, 2982° / 56°

0.03

82 °

Marnett, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high82°

Average low56°

Average precipitation0.03 in

Chance of precipitation18%

Record high94° (2012)

Record low47° (2004)

Sun, 3082° / 56°

0.05

82 °

Marnett, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high82°

Average low56°

Average precipitation0.05 in

Chance of precipitation15%

Record high92° (1990)

Record low46° (1964)

Mon, 3181° / 55°

0.04

81 °

Marnett, Monday, 31 August

Climate normal for this date — 60-year average.

Average high81°

Average low55°

Average precipitation0.04 in

Chance of precipitation20%

Record high94° (2011)

Record low46° (1968)

Tue, 0181° / 54°

0.06

81 °

Marnett, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high81°

Average low54°

Average precipitation0.06 in

Chance of precipitation20%

Record high94° (2019)

Record low44° (1965)

Wed, 0281° / 54°

0.04

81 °

Marnett, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high81°

Average low54°

Average precipitation0.04 in

Chance of precipitation18%

Record high98° (2019)

Record low42° (1974)

Thu, 0381° / 54°

0.02

81 °

Marnett, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high81°

Average low54°

Average precipitation0.02 in

Chance of precipitation13%

Record high93° (2017)

Record low38° (1961)

Fri, 0481° / 54°

0.04

81 °

Marnett, Friday, 4 September

Climate normal for this date — 60-year average.

Average high81°

Average low54°

Average precipitation0.04 in

Chance of precipitation17%

Record high93° (1960)

Record low42° (1961)

Sat, 0581° / 54°

0.03

81 °

Marnett, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high81°

Average low54°

Average precipitation0.03 in

Chance of precipitation18%

Record high97° (2020)

Record low44° (1962)

Sun, 0680° / 54°

0.02

80 °

Marnett, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high80°

Average low54°

Average precipitation0.02 in

Chance of precipitation13%

Record high99° (2020)

Record low44° (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 Marnett, CO 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 Marnett, CO 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.