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Arvada, Colorado 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Arvada CO
National Weather Service Forecast for: Arvada CO
Issued by: National Weather Service Denver-Boulder, CO
Updated: 2:23 am MDT Jul 13, 2025
 
Overnight

Overnight: Mostly clear, with a low around 61. Light west wind.
Mostly Clear

Sunday

Sunday: Sunny, with a high near 91. Calm wind becoming east northeast 5 to 8 mph in the morning.
Sunny

Sunday
Night
Sunday Night: Partly cloudy, with a low around 65. East wind 5 to 8 mph becoming light and variable  after midnight.
Partly Cloudy

Monday

Monday: A 40 percent chance of showers and thunderstorms after noon.  Increasing clouds, with a high near 95. Calm wind becoming south southwest 5 to 9 mph in the afternoon. Winds could gust as high as 15 mph.
Sunny then
Chance
T-storms
Monday
Night
Monday Night: Partly cloudy, with a low around 63. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Partly Cloudy

Tuesday

Tuesday: A 40 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 93.
Sunny then
Chance
T-storms
Tuesday
Night
Tuesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Partly cloudy, with a low around 60. Chance of precipitation is 40%.
Chance
Showers then
Partly Cloudy
Wednesday

Wednesday: Showers and thunderstorms likely after noon.  Mostly cloudy, with a high near 83.
Partly Sunny
then T-storms
Likely
Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 59.
Chance
T-storms then
Mostly Cloudy
Lo 61 °F Hi 91 °F Lo 65 °F Hi 95 °F Lo 63 °F Hi 93 °F Lo 60 °F Hi 83 °F Lo 59 °F

Hazardous Weather Outlook
 

Overnight
 
Mostly clear, with a low around 61. Light west wind.
Sunday
 
Sunny, with a high near 91. Calm wind becoming east northeast 5 to 8 mph in the morning.
Sunday Night
 
Partly cloudy, with a low around 65. East wind 5 to 8 mph becoming light and variable after midnight.
Monday
 
A 40 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 95. Calm wind becoming south southwest 5 to 9 mph in the afternoon. Winds could gust as high as 15 mph.
Monday Night
 
Partly cloudy, with a low around 63. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Tuesday
 
A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 93.
Tuesday Night
 
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 60. Chance of precipitation is 40%.
Wednesday
 
Showers and thunderstorms likely after noon. Mostly cloudy, with a high near 83.
Wednesday Night
 
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 59.
Thursday
 
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 86.
Thursday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Friday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 90.
Friday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Saturday
 
A chance of showers and thunderstorms. Mostly sunny, with a high near 91.

 

Forecast from NOAA-NWS for Arvada CO.

Weather Forecast Discussion
385
FXUS65 KBOU 130523
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
1123 PM MDT Sat Jul 12 2025

.KEY MESSAGES...

- A few strong thunderstorms with locally heavy rain can be
  expected this afternoon roughly along and south of I-70.

- Afternoon showers/thunderstorms to continue most days, albeit
  with slightly lesser coverage Sunday and Monday.

- High temperatures to linger in the 90s across the plains from
  Sunday through mid-week.

&&

.DISCUSSION /Through Saturday/...
Issued at 224 PM MDT Sat Jul 12 2025

This morning`s (Saturday) low clouds have finally scattered out
across the forecast area and a Denver Cyclone has developed. Current
satellite imagery shows some cumulus starting to build along the
higher terrain, with a few weak reflectivity returns starting to
show in northern Park/western Jefferson Counties where surface
heating has been greatest so far today. With enough instability in
place as shown by the 500 to 1000 J/kg of MLCAPE shown in the SPC
Meso Analysis, these cumulus are expected to transition into
scattered showers and storms by early this afternoon. With a
prominent cap in place across the lower elevations as portrayed
in the latest ACARS sounding, these showers and storms won`t have
much luck of persisting onto the lower elevations where CAPE is
far more robust. However, with WNW to NNW steering flow in place,
storms that form will have potential to move along the higher
terrain where the cap is already broken, and we could see an
isolated threat for severe hail and some gusty outflows through
the early evening. With the cyclone in place, there is a chance
that the convergence zone could aid in breaking the cap along the
Palmer Divide and slightly north onto the adjacent plains where
the more robust CAPE will be in play, but have kept the greatest
PoPs south and west of the urban corridor where guidance continues
to portray things staying along and south of I-70 in the
mountains and foothills.

Light NNW flow aloft will persist into Sunday as the ridge over
the southwest remains in place. Instability will increase over the
mountains as forecast soundings show SBCAPE reaching 700-800 J/kg
and mid-level lapse rates steepening to 9+C/km by the afternoon.
This will promote scattered afternoon and evening convection, with
showers and storms expected to remain anchored to the higher
terrain. Temperatures will return to the 90s across the lower
elevations on Sunday and persist there through the first half of
the week.

Models are fairly consistent for the first half of the week,
keeping pulses of afternoon mountain convection each day, becoming
more widespread by Tuesday. Some discrepancies with timing of a
shortwave trough entering the Pacific Northwest on Tuesday are
evident between the ensembles, with the GFS supporting a cooldown
on Tuesday/Wednesday, whereas the ECM ens keeps an extra day of
90F+ for the plains, seeing a cooldown for Wednesday/Thursday
instead. The NBM seemed like a reasonable solution based on the
differences, so little changes were made past Monday for this
package. While the timing may be off, the signal is in place that
a brief cooldown will occur by mid-week. Past that, ensembles show
that the 90s will return and look to stick around across the
plains through at least the last week of July.

&&

.AVIATION /06Z TAFS through 06Z Monday/...
Issued at 1121 PM MDT Sat Jul 12 2025

VFR through the TAF period. Drainage winds have established at the
terminals and will prevail through the rest of the overnight
period. Winds are expected to weaken by 12-15z, with an eventual
turn to the north, then northeast by the early afternoon. A
gradual clockwise turn is forecast through Sunday afternoon and
evening. There are no ceiling or visibility concerns through
Sunday night.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION...Bonner
AVIATION...Hiris
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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