Climate averages 1991–2020
Tulcán weather
in September.
A mild, wet month: the joint 5th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Tulcán: daytime highs average 16.5°C and nights cool to about 8.7°C. By daytime temperature it is the joint 5th warmest of the 12 months.
Expect about 109 mm of rain on roughly 22 days, which makes September a wet month (the 2nd 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 (9 km away). In September its highs average 15.7°C, 0.8°C cooler than Tulcán, with 109 mm of rain.
Among the 9 cities listed in Ecuador, Tulcán ranks 9th of 9 for the warmest September highs and 8th of 9 for the driest September (rainfall, lowest first). The mean September high of those 9 cities is 23.4°C; Tulcán is 6.9°C cooler than that mean.
From September to October, average highs rise by 0.3°C to 16.8°C, and monthly rainfall rises from 109 mm to 230 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
Tulcán climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 16.3°C9.6°C | 9.6°C | 220 | 27.5 | 12.112 h |
| February | 16.6°C9.7°C | 9.7°C | 207 | 25.1 | 12.112 h |
| March | 16.6°C9.8°C | 9.8°C | 251 | 29.4 | 12.112 h |
| April | 16.5°C9.9°C | 9.9°C | 258 | 29.2 | 12.112 h |
| May | 16.2°C9.8°C | 9.8°C | 200 | 29.8 | 12.212 h |
| June | 15.4°C9.0°C | 9.0°C | 160 | 27.4 | 12.212 h |
| July | 15.0°C8.4°C | 8.4°C | 147 | 27.0 | 12.212 h |
| August | 15.6°C8.2°C | 8.2°C | 94 | 22.7 | 12.112 h |
| September, selected | 16.5°C8.7°C | 8.7°C | 109 | 21.9 | 12.112 h |
| October | 16.8°C9.4°C | 9.4°C | 230 | 27.4 | 12.112 h |
| November | 16.7°C9.9°C | 9.9°C | 290 | 28.0 | 12.112 h |
| December | 16.4°C9.8°C | 9.8°C | 269 | 29.1 | 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 · 9 kmHigh 15.7°C · Low 8.2°C · 109 mm rain
- Pasto in SeptemberColombia · 66 kmHigh 18.9°C · Low 10.3°C · 99 mm rain
- Ibarra in SeptemberEcuador · 69 kmHigh 21.9°C · Low 10.7°C · 75 mm rain
- Tumaco in SeptemberColombia · 162 kmHigh 26.4°C · Low 23.9°C · 230 mm rain
- Santo Domingo de los Colorados in SeptemberEcuador · 201 kmHigh 24.1°C · Low 19.0°C · 87 mm rain
- Esmeraldas in SeptemberEcuador · 216 kmHigh 27.6°C · Low 22.8°C · 67 mm rain
- Pitalito in SeptemberColombia · 218 kmHigh 22.7°C · Low 13.4°C · 200 mm rain
- Popayán in SeptemberColombia · 218 kmHigh 23.2°C · Low 14.1°C · 145 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 Tulcán) is explained once on the Tulcán year overview and on the Sources, method and limits page.
Ipiales lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.