Monthly outlook for Irondale, CO: average high 91.7°, average low 67.4°. That is 4.6° above the climate normal for August. Precipitation is expected on 8 days (about 3.6 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 12 August (101.9°), the coolest 16 August (63.1°).
91.7°/67.4°
Average high / low
+4.6°
Above normal
8 / 4
Wet days / normal
3.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
93.1°
83.5°
+5.3°
18 August – 27 August
89.3°
83.2°
+3.4°
28 August – 6 September
at normal
82.1°
—
August records over 66 years
99.9°5 August 2025All-time high
42.1°28 August 2004All-time low
Climate normals and records are computed from the nearest reference point — Thornton (5 mi).
Sun, 0995° / 67°0
95 °
Irondale, Sunday, 9 August
Overcast. High 95°, low 67°.
Pressure29.77 inHg
Wind1.9 mph SE
Humidity9%
Visibility6.2 mi
Dew point29°
Mon, 10100° / 64°0.04
100 °
Irondale, Monday, 10 August
Light rain. High 100°, low 64°.
Pressure29.80 inHg
Wind3.3 mph E
Humidity15%
Visibility6.2 mi
Dew point39°
Tue, 11100° / 74°0
100 °
Irondale, Tuesday, 11 August
Overcast. High 100°, low 74°.
Pressure29.80 inHg
Wind1.6 mph NE
Humidity13%
Visibility6.2 mi
Dew point38°
Wed, 12102° / 74°0.02
102 °
Irondale, Wednesday, 12 August
Light rain. High 102°, low 74°.
Pressure29.74 inHg
Wind4.2 mph NE
Humidity16%
Visibility6.2 mi
Dew point40°
Thu, 1389° / 64°0.84
89 °
Irondale, Thursday, 13 August
Heavy rain. High 89°, low 64°.
Pressure29.77 inHg
Wind16.5 mph NW
Humidity35%
Visibility—
Dew point52°
Fri, 1482° / 65°0.54
82 °
Irondale, Friday, 14 August
Rain. High 82°, low 65°.
Pressure29.94 inHg
Wind14.1 mph S
Humidity59%
Visibility—
Dew point58°
Sat, 1586° / 66°0.76
86 °
Irondale, Saturday, 15 August
Rain. High 86°, low 66°.
Pressure30.09 inHg
Wind17.7 mph S
Humidity54%
Visibility—
Dew point58°
Sun, 1689° / 63°0.1
89 °
Irondale, Sunday, 16 August
Light rain. High 89°, low 63°.
Pressure30.03 inHg
Wind9.4 mph SW
Humidity41%
Visibility—
Dew point53°
Mon, 1792° / 68°0.01
92 °
Irondale, Monday, 17 August
Light rain. High 92°, low 68°.
Pressure29.97 inHg
Wind19.3 mph W
Humidity24%
Visibility—
Dew point44°
Tue, 1896° / 69°0
96 °
Irondale, Tuesday, 18 August
Clear. High 96°, low 69°.
Pressure29.94 inHg
Wind12.5 mph S
Humidity20%
Visibility—
Dew point42°
Wed, 1987° / 66°1.18
87 °
Irondale, Wednesday, 19 August
Heavy rain. High 87°, low 66°.
Pressure30.00 inHg
Wind22.9 mph N
Humidity34%
Visibility—
Dew point48°
Thu, 2079° / 68°0.04
79 °
Irondale, Thursday, 20 August
Light rain. High 79°, low 68°.
Pressure29.94 inHg
Wind6.8 mph N
Humidity43%
Visibility—
Dew point53°
Fri, 2187° / 66°0.07
87 °
Irondale, Friday, 21 August
Light rain. High 87°, low 66°.
Pressure29.77 inHg
Wind10.4 mph NW
Humidity30%
Visibility—
Dew point48°
Sat, 2292° / 68°0
92 °
Irondale, Saturday, 22 August
Partly cloudy. High 92°, low 68°.
Pressure29.85 inHg
Wind13.7 mph S
Humidity19%
Visibility—
Dew point38°
Sun, 2393° / 69°0
93 °
Irondale, Sunday, 23 August
Overcast. High 93°, low 69°.
Pressure29.83 inHg
Wind14.5 mph SE
Humidity22%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2483° / 57°0.06
83 °
Irondale, Monday, 24 August
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0.06 in
Chance of precipitation20%
Record high97° (2020)
Record low47° (1968)
Tue, 2583° / 57°0.04
83 °
Irondale, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low57°
Average precipitation0.04 in
Chance of precipitation18%
Record high97° (2020)
Record low46° (1972)
Wed, 2683° / 58°0.05
83 °
Irondale, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low58°
Average precipitation0.05 in
Chance of precipitation28%
Record high94° (2020)
Record low48° (1992)
Thu, 2783° / 58°0.04
83 °
Irondale, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low58°
Average precipitation0.04 in
Chance of precipitation15%
Record high94° (2020)
Record low44° (1992)
Fri, 2882° / 57°0.02
82 °
Irondale, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low57°
Average precipitation0.02 in
Chance of precipitation20%
Record high91° (2024)
Record low42° (2004)
Sat, 2983° / 56°0.02
83 °
Irondale, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low56°
Average precipitation0.02 in
Chance of precipitation13%
Record high93° (2012)
Record low47° (2004)
Sun, 3083° / 56°0.05
83 °
Irondale, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low56°
Average precipitation0.05 in
Chance of precipitation20%
Record high94° (2021)
Record low47° (1968)
Mon, 3182° / 56°0.03
82 °
Irondale, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low56°
Average precipitation0.03 in
Chance of precipitation15%
Record high95° (2023)
Record low46° (1968)
Tue, 0182° / 55°0.06
82 °
Irondale, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high82°
Average low55°
Average precipitation0.06 in
Chance of precipitation20%
Record high97° (2023)
Record low45° (1965)
Wed, 0282° / 55°0.04
82 °
Irondale, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low55°
Average precipitation0.04 in
Chance of precipitation22%
Record high98° (2019)
Record low41° (1974)
Thu, 0382° / 55°0.03
82 °
Irondale, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low55°
Average precipitation0.03 in
Chance of precipitation15%
Record high93° (2017)
Record low38° (1961)
Fri, 0482° / 54°0.03
82 °
Irondale, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low54°
Average precipitation0.03 in
Chance of precipitation15%
Record high94° (2022)
Record low40° (1961)
Sat, 0582° / 55°0.02
82 °
Irondale, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high82°
Average low55°
Average precipitation0.02 in
Chance of precipitation17%
Record high98° (2020)
Record low42° (1968)
Sun, 0682° / 55°0.03
82 °
Irondale, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high82°
Average low55°
Average precipitation0.03 in
Chance of precipitation15%
Record high98° (2020)
Record low45° (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 Irondale, 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 Irondale, 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.