USA Houston Weather in May — Climate Guide
May in Houston is moderate
May is moderate for Houston.
OTC TRIPLES HOTELS — the world's largest energy industry trade fair (early May, 70,000+ attendees at NRG Park). Hotels triple in price, book 6+ months ahead. 31°C humidity rising. Memorial Day weekend Galveston peak.
Travel score
Houston May Weather Stats
Avg High
31°C
Avg Low
21°C
Rainy Days
9
130mm total
Sunshine
9h
Daily avg
Humidity
72%
high
UV Index
10
Very high
Wind
13 km/h
Gusts 40
Sea Temp
25°C
cool
Crowds
Busy
At attractions
May Sunrise & Sunset
Air Quality
PM2.5
25 μg/m³
PM10
45 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
35°C
Nighttime
22°C
Humidity and wind affect how the actual temperature feels.
Wind
13 km/h
Max gust 40 km/h
Activities Recommended for May
May Travel Pros & Cons
Pros
- 31°C beach season starts Galveston
- Astros prime season
- Pollen drops mid-May
- Daylight 13h 45min
Cons
- OTC week hotels triple (early May)
- 130mm rain peak month
- Humidity 72% rising
- Memorial Day hotels +30%
May Events & Festivals
- OTC Offshore Technology Conference (world's largest energy industry trade fair, 70,000+ attendees)
- Memorial Day weekend
- Tornado season continues
Houston in May — Full Picture
OTC TRIPLES HOTELS — the world's largest energy industry trade fair (early May, 70,000+ attendees at NRG Park). Hotels triple in price, book 6+ months ahead. 31°C humidity rising. Memorial Day weekend Galveston peak.
What to Wear & What to Pack
Hot + humid. T-shirts + shorts + heavy AC layers.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current27.7°C
17°C
8.7/mo
Summer (Jun·Jul·Aug)
34.7°C
24.7°C
8/mo
Autumn (Sep·Oct·Nov)
27.7°C
17°C
8/mo
Winter (Dec·Jan·Feb)
19°C
9°C
8/mo
Houston Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 18° | 8° | 8d·90mm | 5h | 70% | 4 | Quiet | Low season | |
| 20° | 10° | 8d·80mm | 6h | 70% | 5 | Busy | Peak | |
| March (Best) | 24° | 13° | 8d·80mm | 7h | 70% | 7 | Busy | Peak |
| April (Best) | 28° | 17° | 9d·95mm | 8h | 70% | 9 | Moderate | Shoulder |
| 31° | 21° | 9d·130mm | 9h | 72% | 10 | Busy | Peak | |
| 34° | 24° | 9d·120mm | 10h | 73% | 11 | Busy | Shoulder | |
| 35° | 25° | 7d·95mm | 10h | 73% | 11 | Moderate | Shoulder | |
| 35° | 25° | 8d·105mm | 9h | 74% | 10 | Quiet | Low season | |
| 32° | 22° | 8d·130mm | 9h | 73% | 9 | Moderate | Shoulder | |
| October (Best) | 28° | 17° | 8d·110mm | 9h | 70% | 7 | Busy | Peak |
| November (Best) | 23° | 12° | 8d·90mm | 7h | 70% | 5 | Busy | Shoulder |
| 19° | 9° | 8d·100mm | 6h | 70% | 4 | Moderate | Shoulder |
View Other Months
Houston May Hotel Picks
Frequently Asked Questions
Is May a good time to visit Houston?
Houston in May is moderate. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in Houston in May?
Houston May averages a high of 31°C and a low of 21°C.
Does it rain much in Houston in May?
Houston May averages 130mm of rainfall over about 9 rainy days.
What should I wear in Houston in May?
Hot + humid. T-shirts + shorts + heavy AC layers.
What time are sunrise and sunset in Houston in May?
Houston May sunrise is 06:25 and sunset is 20:15, with 13h 50min of daylight.
What's the air quality like in Houston in May?
Houston May air quality (AQI) averages 70, rated Moderate. PM2.5 averages 25μg/m³.
What activities are recommended in Houston in May?
In May, Houston is great for NASA Space Center, Astros games, Galveston beach Memorial Day.
Is May peak season in Houston?
Houston May crowds are busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Houston
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.