Climate averages 1991–2020
Pasto weather
in September.
A mild, wet month: the warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Pasto: daytime highs average 18.9°C and nights cool to about 10.3°C. By daytime temperature it is the warmest month of the year.
Expect about 99 mm of rain on roughly 20 days, which makes September a wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 07 min on an average September day.
The nearest other city in this atlas is Ipiales (59 km away). In September its highs average 15.7°C, 3.2°C cooler than Pasto, with 109 mm of rain.
Among the 46 cities listed in Colombia, Pasto ranks 45th of 46 for the warmest September highs and 10th of 46 for the driest September (rainfall, lowest first). The mean September high of those 46 cities is 26.4°C; Pasto is 7.5°C cooler than that mean.
From September to October, average highs fall by 0.8°C to 18.1°C, and monthly rainfall rises from 99 mm to 195 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Pasto climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 17.6°C10.9°C | 10.9°C | 177 | 22.4 | 12.112 h |
| February | 17.9°C11.0°C | 11.0°C | 184 | 22.6 | 12.112 h |
| March | 17.9°C11.1°C | 11.1°C | 235 | 27.5 | 12.112 h |
| April | 17.9°C11.3°C | 11.3°C | 231 | 27.5 | 12.112 h |
| May | 17.8°C11.3°C | 11.3°C | 181 | 27.3 | 12.212 h |
| June | 17.6°C11.0°C | 11.0°C | 114 | 23.7 | 12.212 h |
| July | 17.6°C10.5°C | 10.5°C | 92 | 22.2 | 12.212 h |
| August | 18.5°C10.2°C | 10.2°C | 63 | 16.6 | 12.212 h |
| September, selected | 18.9°C10.3°C | 10.3°C | 99 | 19.9 | 12.112 h |
| October | 18.1°C10.6°C | 10.6°C | 195 | 25.2 | 12.112 h |
| November | 17.3°C10.8°C | 10.8°C | 244 | 26.5 | 12.112 h |
| December | 17.4°C10.9°C | 10.9°C | 221 | 25.7 | 12.112 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Ipiales in SeptemberColombia · 59 kmHigh 15.7°C · Low 8.2°C · 109 mm rain
- Tulcán in SeptemberEcuador · 66 kmHigh 16.5°C · Low 8.7°C · 109 mm rain
- Ibarra in SeptemberEcuador · 135 kmHigh 21.9°C · Low 10.7°C · 75 mm rain
- Pitalito in SeptemberColombia · 154 kmHigh 22.7°C · Low 13.4°C · 200 mm rain
- Popayán in SeptemberColombia · 155 kmHigh 23.2°C · Low 14.1°C · 145 mm rain
- Tumaco in SeptemberColombia · 180 kmHigh 26.4°C · Low 23.9°C · 230 mm rain
- Florencia in SeptemberColombia · 191 kmHigh 27.2°C · Low 18.0°C · 108 mm rain
- Cali in SeptemberColombia · 260 kmHigh 26.2°C · Low 18.7°C · 207 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Pasto) is explained once on the Pasto year overview and on the Sources, method and limits page.