Weather in Boulder

United States · Colorado · 40.0150, -105.2706

Today Now 6:04 AM

+43° Mostly clear

Hourly forecast

Today10/19 Temperature°F Cloudiness Precipitation Windmph Wind gusts Humidity PressureinHg Dew point°F Visibilitymi UV index
Hourly forecast — Boulder

Forecast in words

Today

During the day mostly clear, up to +66°, at night around +43°. Wind gusts reach 6 mph. No precipitation expected.

Tomorrow

Tomorrow mostly clear, high +70°, low +45°, 4° warmer.

Week

Seven days ahead fall within +37°…+72°. Warmest day — Wed, up to +72°. Coldest night — Sun, around +37°. No precipitation expected this week. Sunshine expected on 6 of seven days. Colder closer to the weekend.

Week vs norm

  1. Today 10/19 +66° +7° usually +59°
  2. Tomorrow 10/20 +70° +12° usually +58°
  3. Wed 10/21 +72° +14° usually +58°
  4. Thu 10/22 +70° +13° usually +57°
  5. Fri 10/23 +72° +15° usually +57°
  6. Sat 10/24 +63° +6° usually +56°
  7. Sun 10/25 +68° +12° usually +56°
  8. Mon 10/26 +48° −7° usually +55°

Difference between forecast daytime high and the 1991–2020 norm for this date.

This day, October 19

Today is a typical day for this date.

  • Heat record +78° 2003
  • Cold record +16° 1999
  • Most precipitation 0.4 in 2005
  • Strongest gust 36 mph 2007

Records for this calendar date, 1991-2024, ERA5 reanalysis.

Climate in Boulder

Today is about 5° warmer than usual for October.

Climate normals by month, Boulder
Month Daytime / Nighttime Average Precipitation in
Jan +36° / +13° +22° 1.1
Feb +38° / +14° +24° 1.3
Mar +47° / +21° +32° 2.2
Apr +55° / +28° +40° 3.1
May +64° / +38° +50° 4.4
Jun +76° / +48° +62° 3.3
Jul +81° / +54° +67° 3.2
Aug +79° / +53° +65° 3.0
Sep +73° / +46° +58° 2.2
Oct +60° / +34° +45° 1.9
Nov +46° / +22° +32° 1.4
Dec +37° / +14° +23° 1.1

Climatic normals for 1991–2025 years from ERA5-Land reanalysis.

Astronomical data

Sunrise / sunset 7:16 AM | 6:15 PM
Moon 3:06 PM | 12:11 AM
Moon phase Waxing gibbous 60%
Next solar eclipse
Calculating for this city…

Weather in the region