Skip to content
Join our Newsletter

Longmont Weather Forecast 6/29-30/2020

In Brief:

Heat is interrupted by a passing trough Tuesday/Wednesday to be replaced by days of above normal heat again with daily thunderstorm chances.

Forecast Discussion:

No large scale storms are in the offing, but there is a fair amount of (mainly) Pacific moisture in place across our region (Figure 1 in the gallery). Daily afternoon storms, forming in the mountains and wandering eastward, will be the rule.  For Tuesday/Wednesday, a trough passes the state (with most of the cold air aloft remaining north of Colorado (Figure 2)).  This will cool us to normal temperatures and enhance the afternoon storm chances a bit (green circle Figure 3). The fires in the southwest are are being brought under control so we are seeing much less smoke/haze around northern Colorado (Figure 4). Rainfall, according to the GFS, is very light and spotty over the next 5 days (Figure 5).

The Longer Range Forecast:

By Thursday, a ridge reestablishes itself over the West. By Saturday the entire nation is under a ridge coast to coast (Figure 6). We return to high temperatures in the mid 90'sF most days with afternoon storm chances (Figure 3).  Unfortunately, fire weather conditions will be elevated and these storms might produce some lightning sparked fires.

Independence Day:

We will have a big ridge over most of the U.S. for Independence Day with high in the lower 90'sF and a fair chance of an afternoon thunderstorm. Summer and typical 4th of July weather.


About the Author: John Ensworth

John Ensworth used to work from Longmont as the PI for the NASA through the IGES (The Institute for Global Environmental Strategies). He now teaches technology, algebra, astronomy, meteorology, film school, and Lego robotics to middle/high school.
Read more


Comments


Current Weather

Mostly cloudy

Mostly cloudy

7°F

UV Index
0 Low
Pressure
30.27 Rising
Visibility
4 miles
Dewpoint
3 °F
Humidity
86%
Wind
NNE 5.3 mph
Gust
11.9 mph
Wind Chill
-2 °F

Hourly Forecast

Today
2 AM
4°F
Snow
Today
3 AM
3°F
Snow
Today
4 AM
3°F
Snow
Today
5 AM
2°F
Snow
Today
6 AM
1°F
Cloudy
Today
7 AM
-5°F
Mostly cloudy w/ flurries
Today
8 AM
-5°F
Partly sunny w/ flurries
Today
9 AM
-2°F
Mostly sunny
Today
10 AM
1°F
Mostly sunny
Today
11 AM
2°F
Mostly sunny
Today
12 PM
5°F
Mostly sunny
Today
1 PM
7°F
Mostly sunny

7 Day Forecast

Snow

Sunday

17 °F

A little accumulation of snow late in the morning; otherwise, mostly cloudy and cold; start of a prolonged cold wave; bundle up


Snow

Sunday Night

-5 °F

Frigid with snow and flurries, accumulating an inch or two; extreme cold can be dangerous for outdoor activities


Partly sunny w/ flurries

Monday

10 °F

A stray flurry this morning; otherwise, mostly sunny and colder; extreme cold can be dangerous for outdoor activities


Cold

Monday Night

-11 °F

Clear and bitterly cold; extreme cold can be dangerous for outdoor activities


Mostly cloudy

Tuesday

38 °F

Mostly cloudy and not as cold; breezy in the afternoon


Partly cloudy

Tuesday Night

19 °F

Breezy in the evening; otherwise, partly cloudy


Intermittent clouds

Wednesday

36 °F

Intervals of clouds and sun


Intermittent clouds

Wednesday Night

11 °F

Partly cloudy


Mostly sunny

Thursday

39 °F

Mostly sunny


Partly cloudy

Thursday Night

18 °F

Partly cloudy


Sunrise and Sunset

Sunrise
7:19 AM
Sunset
5:04 PM

Based on AccuWeather data