Mild
Average highs are around 22°C, so days are mild rather than hot.
September verdict
Casma, Peru in September
Weather score51Mixed
Mixed for holiday weather
Average highs are around 22°C, so days are mild rather than hot. Sunshine averages 4.2h per day, so this is not one of the brighter months. Rainfall averages 9mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
22°C
Rain
9mm
Sun
4.2h
Sea
17°C
Weather score
51
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 9mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 4.2h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 17°C, so the water can feel cool.
Map
Weather map
Compare Casma, Peru with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September22°C average high
September is cooler than the yearly average, which can make sightseeing feel gentler than in hotter months.
Warmest monthsJanuary to March
This stretch sets the upper range for average daytime heat.
Rain
September9mm average rain
September is close to Casma's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
September4.2 hours average sun
September is below Casma's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsJanuary to April and November to December
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September17°C average sea
September is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJanuary to March
Sea temperatures are usually near 20°C in this stretch, so swimming comfort is at its strongest.
Weather score
September51 weather score
September is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJanuary to April and December
These months have the strongest weather score in the monthly averages.