Mild
Average highs are around 20°C, so days are mild rather than hot.
May verdict
Mixed for holiday weather
Average highs are around 20°C, so days are mild rather than hot. Sunshine averages 11h per day, so bright days are a strong part of the month. Rainfall averages 17mm, which is relatively low for holiday planning.

Monthly averages
Temp
20°C
Rain
17mm
Sun
11h
Weather score
53
Mixed
Mild
Average highs are around 20°C, so days are mild rather than hot.
Drier
Rainfall averages 17mm, which is relatively low for holiday planning.
Bright
Sunshine averages 11h per day, so bright days are a strong part of the month.
Map
Compare Alamosa, Colorado, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
May20°C average high
May sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
May17mm average rain
May is close to Alamosa's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
May11 hours average sun
May is brighter than Alamosa's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to July
This stretch has the strongest sunshine in the monthly averages.
May53 weather score
May scores below Alamosa's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.