Monterrey weather in September
Monterrey in September averages 27°C (81°F), 215 mm of rain and 6.3 hours of sun a day. It is one of the wetter months of the year here.
Of the twelve months in Monterrey, September is the fifth warmest and the wettest.
- Average temp
- 27°C (81°F)
22–32°C · 71–90°F
- Rainfall
- 215 mm
A wet month
- Sunshine
- 6.3 h
hours per day
What is Monterrey like in September?
Daytime
Days are hot, often above 32°C.
Rain
Expect frequent rain — this is a wet month.
Evening
Evenings stay warm.
What should I pack for Monterrey in September?
High-factor sun cream
With daytime highs around 32°C, burn time is short even in shade.
Sunglasses and a brimmed hat
Midday glare is the part people underpack for, not the heat itself.
Loose cotton or linen
Synthetics stop working once you are sweating through them all day.
A refillable water bottle
Daily highs this warm need roughly double the water a temperate day does.
A proper waterproof, not a folding umbrella
215 mm in the month usually arrives as heavy bursts that an umbrella will not cover.
A dry bag for phone and documents
Worth it for one downpour caught between the taxi and the door.
September compared with August and October
September in Monterrey is 2.9°C cooler than August and 134 mm wetter than it, which averages 30°C (86°F).
September in Monterrey is 3°C warmer than October and 154 mm wetter than it, which averages 24°C (75°F).
Daylight in Monterrey in September
On 15 September the sun is up for 12 hours 17 minutes in Monterrey, rising about 06:27 and setting about 18:44 local time.
September ends 43 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 1 hour 27 minutes short of June, the longest-lit month here.
Where to stay in Monterrey
Dates are a starting point for September.
Travel guides for Monterrey
What to read before you book.
Monterrey weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 16°C / 61°F | 18 mm |
| February | 18°C / 65°F | 16 mm |
| March | 22°C / 71°F | 23 mm |
| April | 25°C / 77°F | 32 mm |
| May | 28°C / 82°F | 46 mm |
| June | 30°C / 85°F | 55 mm |
| July | 30°C / 85°F | 98 mm |
| August | 30°C / 86°F | 81 mm |
| September | 27°C / 81°F | 215 mm |
| October | 24°C / 75°F | 61 mm |
| November | 19°C / 67°F | 28 mm |
| December | 16°C / 61°F | 24 mm |
Check another month
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FAQs about Monterrey in September
September climate averages for Monterrey, 1991–2020.
Monterrey averages 27°C (81°F) in September, ranging from about 22°C (71°F) at night to 32°C (90°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Yes, a lot. September brings about 215 mm, which makes it one of the wetter months here — expect heavy bursts rather than all-day drizzle.
Yes. September averages 27°C (81°F) against 24°C (75°F) in October — 3°C warmer.
September is 2.9°C cooler than August, and 134 mm wetter.
It is outside the easiest window. The most comfortable stretch here is February to May; September sits outside it, which usually means more heat, more rain, or both — worth it if you would rather have the place to yourself.
About 6.3 hours of sun a day on the 1991–2020 average.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 17 minutes of daylight in mid-September, against 13 hours 44 minutes in June and 10 hours 33 minutes in December.
On 15 September, sunrise is about 06:27 and sunset about 18:44 local time. Both shift across the month — the month ends 43 minutes shorter than it starts.
