Observed 4:35 AM MDT at KLMO
Longmont, CO weather
Clear and 52°11°, 15°8° warmer than a typical Oct 23.
Today: low 52°11° (likely 48°9° to 53°12°), high 78°26° (likely 76°24° to 80°27°).
Now 52°11°
Clear
- Wind
- 3 mph5 km/h
- From the west. 35–8 mph13 km/h through 5 PM
- Dew point
- 45°7°
- Comfortable · down to 37°3° by 5 PM
- UV index
- 0Low
- Moderate 12–4 PM · peak 4
- Air quality
- 68Moderate
- Main pollutant: PM10 (dust)
- Pressure
- 29.89 inHg1012 hPa
- Falling · −0.04 inHg−1.5 hPa in 3 h
Next 2 hours
No precipitation expected in the next 2 hours.
From forecast models
Next 48 hours
This morningUp to 70°21° by 11 AM · rain chance 10% · Partly cloudy
This afternoonNear 75°24° · Clear
TonightDown to 47°8° by 5 AM · Partly cloudy
Tomorrow morningUp to 52°11° by 11 AM · Mostly cloudy
Tomorrow afternoonNear 54°12° · rain chance 10% · Mostly cloudy
Tomorrow nightDown to 40°4° by 4 AM · rain chance 30% · Cloudy
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Fri 5a | Mostly cloudy | 53°12° (likely 50°10° to 54°12°) | 53°12° | 10% | 3 mph5 km/h from WSW, gusts 10 mph16 km/h | 80% | 60% | 0 |
| Fri 6a | Clear | 53°12° (likely 49°9° to 54°12°) | 53°12° | 5% | 3 mph5 km/h from W, gusts 5 mph7 km/h | 80% | 33% | 0 |
| Fri 7a | Cloudy | 52°11° (likely 48°9° to 53°12°) | 52°11° | 5% | 3 mph5 km/h from WSW, gusts 5 mph9 km/h | 80% | 71% | 0 |
| Fri 8a | Sunny | 52°11° (likely 50°10° to 54°12°) | 52°11° | 5% | 5 mph8 km/h from SW, gusts 7 mph11 km/h | 80% | 25% | 0 |
| Fri 9a | Mostly cloudy | 57°14° (likely 54°12° to 59°15°) | 57°14° | 5% | 5 mph8 km/h from SW, gusts 11 mph17 km/h | 69% | 58% | 0 |
| Fri 10a | Sunny | 65°18° (likely 61°16° to 68°20°) | 65°18° | 5% | 5 mph8 km/h from SSW, gusts 7 mph11 km/h | 50% | 12% | 1 |
| Fri 11a | Sunny | 70°21° (likely 68°20° to 72°22°) | 70°21° | 5% | 5 mph8 km/h from S, gusts 11 mph17 km/h | 41% | 6% | 2 |
| Fri 12p | Sunny | 74°23° (likely 72°22° to 75°24°) | 74°23° | 0% | 6 mph10 km/h from S, gusts 12 mph20 km/h | 34% | 0% | 4 |
| Fri 1p | Sunny | 76°24° (likely 75°24° to 77°25°) | 76°24° | 0% | 6 mph10 km/h from S, gusts 13 mph21 km/h | 30% | 12% | 4 |
| Fri 2p | Sunny | 77°25° (likely 76°24° to 79°26°) | 77°25° | 0% | 6 mph10 km/h from S, gusts 14 mph22 km/h | 25% | 4% | 4 |
| Fri 3p | Sunny | 77°25° (likely 76°24° to 80°27°) | 77°25° | 0% | 7 mph11 km/h from WSW, gusts 17 mph27 km/h | 24% | 13% | 3 |
| Fri 4p | Partly sunny | 77°25° (likely 76°24° to 79°26°) | 77°25° | 0% | 7 mph11 km/h from W, gusts 14 mph22 km/h | 24% | 22% | 2 |
| Fri 5p | Partly sunny | 75°24° (likely 74°23° to 76°24°) | 75°24° | 0% | 8 mph13 km/h from WNW, gusts 16 mph26 km/h | 25% | 61% | 1 |
| Fri 6p | Partly cloudy | 71°22° (likely 68°20° to 71°22°) | 71°22° | 0% | 7 mph11 km/h from WNW, gusts 17 mph27 km/h | 30% | 68% | 0 |
| Fri 7p | Partly cloudy | 69°21° (likely 63°17° to 69°21°) | 69°21° | 0% | 7 mph11 km/h from WNW, gusts 18 mph29 km/h | 32% | 42% | 0 |
| Fri 8p | Partly cloudy | 64°18° (likely 60°16° to 64°18°) | 64°18° | 0% | 7 mph11 km/h from WNW, gusts 17 mph27 km/h | 38% | 63% | 0 |
| Fri 9p | Mostly clear | 61°16° (likely 58°14° to 63°17°) | 61°16° | 0% | 6 mph10 km/h from WNW, gusts 19 mph30 km/h | 44% | 79% | 0 |
| Fri 10p | Partly cloudy | 58°14° (likely 56°13° to 59°15°) | 58°14° | 0% | 6 mph10 km/h from WNW, gusts 6 mph10 km/h | 49% | 84% | 0 |
| Fri 11p | Partly cloudy | 56°13° (likely 54°12° to 56°13°) | 56°13° | 0% | 5 mph8 km/h from W, gusts 6 mph10 km/h | 51% | 43% | 0 |
| Sat 12a | Partly cloudy | 54°12° (likely 52°11° to 54°12°) | 54°12° | 0% | 5 mph8 km/h from WNW, gusts 7 mph11 km/h | 57% | 48% | 0 |
| Sat 1a | Mostly clear | 53°12° (likely 49°9° to 53°12°) | 53°12° | 0% | 3 mph5 km/h from WNW, gusts 6 mph10 km/h | 59% | 45% | 0 |
| Sat 2a | Mostly clear | 50°10° (likely 47°8° to 52°11°) | 48°9° | 0% | 5 mph8 km/h from W, gusts 5 mph8 km/h | 63% | 56% | 0 |
| Sat 3a | Clear | 49°9° (likely 46°8° to 51°11°) | 48°9° | 0% | 3 mph5 km/h from W, gusts 5 mph8 km/h | 66% | 27% | 0 |
| Sat 4a | Cloudy | 49°9° (likely 46°8° to 50°10°) | 48°9° | 0% | 3 mph5 km/h from WNW, gusts 5 mph8 km/h | 66% | 69% | 0 |
| Sat 5a | Cloudy | 47°8° (likely 46°8° to 49°9°) | 46°8° | 0% | 3 mph5 km/h from N, gusts 4 mph6 km/h | 71% | 70% | 0 |
| Sat 6a | Cloudy | 46°8° (likely 45°7° to 48°9°) | 45°7° | 5% | 3 mph5 km/h from N, gusts 6 mph10 km/h | 71% | 72% | 0 |
| Sat 7a | Mostly cloudy | 46°8° (likely 45°7° to 47°8°) | 44°7° | 5% | 5 mph8 km/h from NNW, gusts 8 mph13 km/h | 73% | 48% | 0 |
| Sat 8a | Cloudy | 45°7° (likely 45°7° to 47°8°) | 42°6° | 5% | 6 mph10 km/h from NNE, gusts 9 mph15 km/h | 76% | 74% | 0 |
| Sat 9a | Cloudy | 49°9° (likely 46°8° to 50°10°) | 46°8° | 5% | 8 mph13 km/h from NE, gusts 11 mph17 km/h | 71% | 66% | 1 |
| Sat 10a | Mostly cloudy | 51°11° (likely 47°8° to 52°11°) | 51°11° | 5% | 9 mph14 km/h from NE, gusts 12 mph19 km/h | 63% | 36% | 2 |
| Sat 11a | Cloudy | 52°11° (likely 47°8° to 53°12°) | 52°11° | 5% | 8 mph13 km/h from NE, gusts 11 mph18 km/h | 59% | 74% | 3 |
| Sat 12p | Cloudy | 54°12° (likely 49°9° to 54°12°) | 54°12° | 10% | 6 mph10 km/h from ENE, gusts 10 mph15 km/h | 52% | 74% | 4 |
| Sat 1p | Cloudy | 54°12° (likely 50°10° to 55°13°) | 54°12° | 10% | 6 mph10 km/h from NE, gusts 8 mph13 km/h | 52% | 78% | 4 |
| Sat 2p | Cloudy | 55°13° (likely 51°11° to 56°13°) | 55°13° | 10% | 5 mph8 km/h from ENE, gusts 7 mph12 km/h | 49% | 82% | 4 |
| Sat 3p | Cloudy | 54°12° (likely 51°11° to 56°13°) | 54°12° | 10% | 6 mph10 km/h from ENE, gusts 7 mph11 km/h | 50% | 86% | 3 |
| Sat 4p | Cloudy | 55°13° (likely 51°11° to 55°13°) | 55°13° | 10% | 5 mph8 km/h from E, gusts 7 mph12 km/h | 49% | 92% | 2 |
| Sat 5p | Cloudy | 54°12° (likely 49°9° to 54°12°) | 54°12° | 10% | 5 mph8 km/h from E, gusts 8 mph13 km/h | 48% | 95% | 1 |
| Sat 6p | Cloudy | 52°11° (likely 47°8° to 52°11°) | 52°11° | 20% | 3 mph5 km/h from E, gusts 8 mph12 km/h | 54% | 96% | 0 |
| Sat 7p | Drizzle | 50°10° (likely 45°7° to 50°10°) | 49°9° | 20% | 3 mph5 km/h from E, gusts 5 mph7 km/h | 61% | 95% | 0 |
| Sat 8p | Cloudy | 49°9° (likely 44°7° to 49°9°) | 48°9° | 20% | 3 mph5 km/h from ESE, gusts 4 mph6 km/h | 66% | 92% | 0 |
| Sat 9p | Cloudy | 47°8° (likely 43°6° to 48°9°) | 47°8° | 20% | 2 mph3 km/h from SE, gusts 8 mph13 km/h | 74% | 91% | 0 |
| Sat 10p | Cloudy | 46°8° (likely 42°6° to 48°9°) | 46°8° | 20% | 2 mph3 km/h from SE, gusts 7 mph11 km/h | 76% | 86% | 0 |
| Sat 11p | Cloudy | 45°7° (likely 41°5° to 47°8°) | 45°7° | 20% | 1 mph2 km/h from ESE, gusts 6 mph10 km/h | 79% | 87% | 0 |
| Sun 12a | Cloudy | 44°7° (likely 41°5° to 46°8°) | 44°7° | 30% | 1 mph2 km/h from ESE, gusts 6 mph9 km/h | 82% | 86% | 0 |
| Sun 1a | Showers | 43°6° (likely 40°4° to 46°8°) | 43°6° | 30% | 1 mph2 km/h from ESE, gusts 6 mph10 km/h | 86% | 79% | 0 |
| Sun 2a | Cloudy | 42°6° (likely 39°4° to 46°8°) | 42°6° | 30% | 1 mph2 km/h from E, gusts 6 mph9 km/h | 89% | 94% | 0 |
| Sun 3a | Cloudy | 41°5° (likely 38°3° to 46°8°) | 41°5° | 30% | 1 mph2 km/h from E, gusts 4 mph7 km/h | 93% | 92% | 0 |
| Sun 4a | Cloudy | 40°4° (likely 38°3° to 45°7°) | 40°4° | 30% | 1 mph2 km/h from E, gusts 5 mph9 km/h | 96% | 92% | 0 |
Days ahead
Today, Oct 23. Cloudy. High 78°26°, low 52°11°. Typical 63°17° / 30°−1°. Dry. Mostly agree.
Morning
6 AM–noon
Mostly cloudy, 52°11°Dry
Afternoon
noon–6 PM
Sunny, 77°25°Dry
Evening
6 PM–midnight
Mostly clear, 64°18°Dry
Overnight
midnight–6 AM
Clear, 47°8°Dry
Official NWS forecast
Today: Mostly sunny. High near 78, with temperatures falling to around 75 in the afternoon. Southwest wind 3 to 8 mph.
Tonight: Mostly cloudy, with a low around 52. West southwest wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 76°24°–80°27°
- Low, likely
- 48°9°–53°12°
- Typical high / low
- 63°17° / 30°−1°
- Wind
- 16 mph26 km/h, gusts 30 mph48 km/h
- UV peak
- 5
Tomorrow, Oct 24. Drizzle. High 55°13°, low 38°3°. Typical 62°17° / 30°−1°. Rain 0.02 in0.5 mm, 10% chance. Forecasts differ.
Morning
6 AM–noon
Cloudy, 45°7°Dry
Afternoon
noon–6 PM
Cloudy, 55°13°Dry
Evening
6 PM–midnight
Drizzle, 49°9°20% chance
Overnight
midnight–6 AM
Showers, 40°4°30% chance
Official NWS forecast
Day: Partly sunny, with a high near 55. Northeast wind 3 to 9 mph.
Night: A chance of rain showers. Mostly cloudy, with a low around 38. East southeast wind around 3 mph. Chance of precipitation is 30%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 51°11°–56°13°
- Low, likely
- 38°3°–46°8°
- Typical high / low
- 62°17° / 30°−1°
- Wind
- 11 mph17 km/h, gusts 21 mph33 km/h
- UV peak
- 4
Sunday, Oct 25. Showers. High 56°13°, low 40°4°. Typical 62°17° / 30°−1°. Rain 0.12 in3 mm, 20% chance. Forecasts differ.
Morning
6 AM–noon
Cloudy, 41°5°20% chance
Afternoon
noon–6 PM
Partly sunny, 57°14°Dry
Evening
6 PM–midnight
Drizzle, 48°9°50% chance · 0.13 in3.4 mm
Overnight
midnight–6 AM
Drizzle, 44°7°50% chance · 0.04 in1 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers. Mostly cloudy, with a high near 56. Chance of precipitation is 20%.
Night: Rain showers likely. Mostly cloudy, with a low around 40.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 53°12°–59°15°
- Low, likely
- 37°3°–43°6°
- Typical high / low
- 62°17° / 30°−1°
- Wind
- 16 mph26 km/h
- UV peak
- 5
Monday, Oct 26. Showers. High 59°15°, low 37°3°. Typical 62°17° / 30°−1°. Rain 0.06 in1.5 mm, 30% chance. Forecasts differ.
Morning
6 AM–noon
Drizzle, 44°7°30% chance · 0.02 in0.4 mm
Afternoon
noon–6 PM
Sunny, 58°15°20% chance
Evening
6 PM–midnight
Clear, 48°9°Dry
Overnight
midnight–6 AM
Clear, 37°3°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers. Partly sunny, with a high near 59.
Night: Partly cloudy, with a low around 37.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 53°12°–61°16°
- Low, likely
- 37°3°–42°6°
- Typical high / low
- 62°17° / 30°−1°
- Wind
- 10 mph15 km/h, gusts 22 mph36 km/h
- UV peak
- 4
Tuesday, Oct 27. Partly sunny. High 64°18°, low 38°3°. Typical 61°16° / 29°−2°. Dry. Forecasts differ.
Morning
6 AM–noon
Mostly sunny, 38°3°Dry
Afternoon
noon–6 PM
Sunny, 63°17°Dry
Evening
6 PM–midnight
Clear, 52°11°Dry
Overnight
midnight–6 AM
Clear, 42°5°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 64.
Night: Mostly clear, with a low around 38.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 60°16°–66°19°
- Low, likely
- 34°1°–38°3°
- Typical high / low
- 61°16° / 29°−2°
- Wind
- 9 mph14 km/h, gusts 17 mph27 km/h
- UV peak
- 4
Wednesday, Oct 28. Partly sunny. High 64°18°, low 38°3°. Typical 61°16° / 29°−2°. Dry. Forecasts differ.
Morning
6 AM–noon
Sunny, 44°7°Dry
Afternoon
noon–6 PM
Sunny, 63°17°Dry
Evening
6 PM–midnight
Clear, 49°10°Dry
Overnight
midnight–6 AM
Clear, 36°2°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 64.
Night: Partly cloudy, with a low around 38.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 60°16°–67°19°
- Low, likely
- 36°2°–44°7°
- Typical high / low
- 61°16° / 29°−2°
- Wind
- 14 mph22 km/h, gusts 35 mph56 km/h
- UV peak
- 4
Thursday, Oct 29. Cloudy. High 61°16°, low 36°2°. Typical 60°16° / 29°−2°. Dry. Forecasts differ.
Morning
6 AM–noon
Cloudy, 38°4°Dry
Afternoon
noon–6 PM
Cloudy, 58°15°Dry
Evening
6 PM–midnight
Cloudy, 47°8°Dry
Overnight
midnight–6 AM
Clear, 36°2°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 61.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 52°11°–65°18°
- Low, likely
- 34°1°–38°3°
- Typical high / low
- 60°16° / 29°−2°
- Wind
- 12 mph20 km/h, gusts 22 mph35 km/h
- UV peak
- 4
Friday, Oct 30. Snow. High 56°13°, low 36°2°. Typical 60°16° / 28°−2°. Snow 0–2 in0–5 cm, 10% chance. Forecasts differ.
Morning
6 AM–noon
Cloudy, 38°3°Dry
Afternoon
noon–6 PM
Cloudy, 54°12°Dry
Evening
6 PM–midnight
Snow, 45°7°Dry
Overnight
midnight–6 AM
Fog, 36°2°Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 41°5°–64°18°
- Low, likely
- 34°1°–41°5°
- Typical high / low
- 60°16° / 28°−2°
- Wind
- 8 mph14 km/h, gusts 16 mph26 km/h
- UV peak
- 2
Saturday, Oct 31. Snow. High 58°14°, low 37°3°. Typical 60°16° / 28°−2°. Snow 0.03 in0.8 mm, 20% chance. Forecasts differ.
Morning
6 AM–noon
Mostly sunny, 40°4°Dry
Afternoon
noon–6 PM
Sunny, 58°15°Dry
Evening
6 PM–midnight
Mostly clear, 47°8°Dry
Overnight
midnight–6 AM
Clear, 35°2°Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 46°8°–66°19°
- Low, likely
- 33°1°–41°5°
- Typical high / low
- 60°16° / 28°−2°
- Wind
- 8 mph13 km/h
- UV peak
- 4
Sunday, Nov 1. Sunny. High 55°13°, low 36°2°. Typical 59°15° / 28°−2°. Rain 0.04 in1 mm, 20% chance. Mostly agree.
Morning
6 AM–noon
Cloudy, 40°4°Dry
Afternoon
noon–6 PM
Sunny, 57°14°Dry
Evening
6 PM–midnight
Clear, 46°8°20% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 51°11°–58°14°
- Low, likely
- 28°−2°–41°5°
- Typical high / low
- 59°15° / 28°−2°
- Wind
- 10 mph16 km/h
- UV peak
- 4
The outlook
Today
Dry, high 78°, low 52°.
Tomorrow
Dry, high 55°, low 38°, cooling off.
Sunday
Dry, high 56°, low 40°.
Rest of week
Mostly dry, highs 55–64°.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (BOU) (opens in a new tab)
What changed since yesterday
No meaningful changes from yesterday’s forecast.
Radar
For your home
What this week’s weather means for heating, cooling, pipes and fresh air.
Heating this week
About 84% less heating than a typical week.
Heating degree days, base 65°F
Heat-pump hours, next 7 days
- h below 47°F
- 12
- h below 17°F
- 0
- h below 5°F
- 0
47, 17 and 5°F are the test points heat pumps are rated at. About 3 hours are near freezing and damp, when outdoor units defrost more often.
Comfort
Dry air outside (dew point 45°F).
Open the windows?
Today, 10:00 AM–9:00 PM
Good stretch to open the windows.
Is this typical?
Oct 23, today vs a typical year
Today’s expected high is 15°8° warmer than typical.
- Normal high / low
- 63°17° / 30°−1°
- Forecast high / low
- 78°26° / 52°11°
- Record high
- 86°30° in 2003
- Record low
- 16°−9° in 1920
Last 7 days vs normal
On average 6°3° warmer than normal (daily mean temperature).
- −4°−2°SatOct 17
- +5°+3°SunOct 18
- +9°+5°MonOct 19
- +6°+3°TueOct 20
- +9°+5°WedOct 21
- +13°+7°ThuOct 22
- —FriOct 23
Longmont weather by month: normals, records, snow and freeze dates
Sun & moon
Sun
Sunrise 7:19 AM, sunset 6:08 PM.
- Daylight
- 10 h 49 min
- Losing 2 min 30 s a day; shortest Dec 21, 1 h 30 min less
- Golden hour
- 5:31–6:25 PM
- Morning 7:02–7:57 AM
- Blue hour
- 6:25–6:36 PM
- Morning 6:52–7:02 AM; first light 6:52 AM
Stars tonight? Poor
Clouds most of the night (about 47% cover).
Moon
Waxing gibbous
91% lit · growing
- Today
- sets 4:29 AM · rises 4:42 PM
- Full moon
- Oct 25
- New moon
- Nov 9
UniColorado Heating & Cooling, a Denver HVAC installer
UniColorado Heating & Cooling installs heat pumps, furnaces and air conditioning across the Front Range. 12,000+ heat pumps installed since 2014.