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Fort Collins 15-day weather forecast

Updated: 02:03

In the first week, Fort Collins can expect around 7–17 °C with 0 wet days (at least 1 mm). The second week looks cooler, by about 5 °C: around 6–12 °C on average. Warmest day: Thursday (29 Oct) at 18 °C; coldest night: Thursday (29 Oct) at 0 °C.

Week 1 – detailed forecast

Thursday • 10.29
0° / 18°
☁️
overcast
Precipitation 0.0 mm
Chance of rain 0%
Wind (max) 11 km/h
Reliability reliable
Friday • 10.30
6° / 18°
🌫️
fog
Precipitation 0.0 mm
Chance of rain 0%
Wind (max) 9 km/h
Reliability reliable
Saturday • 10.31
6° / 18°
🌫️
fog
Precipitation 0.0 mm
Chance of rain 1%
Wind (max) 11 km/h
Reliability reliable
Sunday • 11.01
11° / 16°
☁️
overcast
Precipitation 0.0 mm
Chance of rain 26%
Wind (max) 14 km/h
Reliability moderate
Monday • 11.02
9° / 14°
🌦️
light drizzle
Precipitation 0.5 mm
Chance of rain 41%
Wind (max) 40 km/h
Reliability moderate
Tuesday • 11.03
7° / 18°
☁️
overcast
Precipitation 0.0 mm
Chance of rain 14%
Wind (max) 30 km/h
Reliability moderate
Wednesday • 11.04
10° / 18°
☁️
overcast
Precipitation 0.0 mm
Chance of rain 12%
Wind (max) 12 km/h
Reliability moderate

Week 2 – indicative trend

Thursday • 11.05
10° / 16°
☁️
overcast
Precipitation 0.0 mm
Chance of rain 16%
Wind (max) 24 km/h
Reliability trend only
Friday • 11.06
7° / 12°
🌦️
moderate drizzle
Precipitation 1.9 mm
Chance of rain 20%
Wind (max) 16 km/h
Reliability trend only
Saturday • 11.07
4° / 7°
❄️
light snow
Precipitation 21.8 mm
Chance of rain 20%
Wind (max) 16 km/h
Reliability trend only
Sunday • 11.08
4° / 12°
🌧️
heavy drizzle
Precipitation 2.1 mm
Chance of rain 19%
Wind (max) 13 km/h
Reliability trend only
Monday • 11.09
6° / 12°
☁️
overcast
Precipitation 0.0 mm
Chance of rain 10%
Wind (max) 13 km/h
Reliability trend only
Tuesday • 11.10
6° / 12°
☁️
overcast
Precipitation 0.0 mm
Chance of rain 3%
Wind (max) 6 km/h
Reliability trend only
Wednesday • 11.11
8° / 15°
☁️
overcast
Precipitation 0.0 mm
Chance of rain 0%
Wind (max) 25 km/h
Reliability trend only
Thursday • 11.12
6° / 12°
☁️
overcast
Precipitation 0.0 mm
Chance of rain 6%
Wind (max) 17 km/h
Reliability trend only

How accurate is a 15-day forecast?

Weather models are reliable for the first few days, but small errors grow over time. That is why every day on this page is marked: days 1–3 are reliable, days 4–7 moderately so, and from day 8 onwards the forecast shows the direction of travel – a warmer or cooler spell, a wetter period – rather than the exact temperature of a given day.

In depth: how accurate are weather forecasts?

Related pages

Frequently asked questions

What will the weather be like in Fort Collins over the next 15 days?

In the first week, Fort Collins can expect around 7–17 °C with 0 wet days (at least 1 mm). The second week looks cooler, by about 5 °C: around 6–12 °C on average. Warmest day: Thursday (29 Oct) at 18 °C; coldest night: Thursday (29 Oct) at 0 °C.

Will it rain in Fort Collins in the next 15 days?

The models show at least 1 mm of rain on 3 of the next 15 days. The wettest day looks like Saturday (7 Nov) with about 21.8 mm. From day 8 onwards this is a trend, not an exact daily figure.

How reliable is a 15-day forecast?

Days 1–3 are usually reliable and days 4–7 moderately so. Beyond that the forecast shows the trend rather than exact daily values — check back each day.