Oman Muscat Weather in September — Climate Guide
September in Muscat is low
September is low for Muscat.
September in Muscat is the last hard month of summer — around 39°C/28°C (102°F/82°F), dry (about 2mm), and still humid, though the heat begins to relent very late in the month.
It stays low season, with cheap rates and few tourists for most of September. Days are organised around the heat — indoors at midday, outdoors only at the edges. The sea is at its warmest of the year.
Travel score
Muscat September Weather Stats
Avg High
39°C
Avg Low
28°C
Rainy Days
0
2mm total
Sunshine
10h
Daily avg
Humidity
60%
humid
UV Index
10
Very high
Wind
12 km/h
Gusts 24
Sea Temp
30°C
Avg water temp
Crowds
Quiet
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
37 μg/m³
PM10
80 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
43°C
Nighttime
30°C
Humidity and wind affect how the actual temperature feels.
Wind
12 km/h
Max gust 24 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Low-season prices continue
- Sea at its warmest
- Heat easing in the final days
- Quiet attractions
Cons
- Still very hot and humid most of the month
- Outdoor activity dawn/dusk only
- Wadis/desert hard until late month
- Extreme UV (10)
September Events & Festivals
- Heat starting to ease very late month — still low season
- Low rates continue
- Wadis/desert returning to feasibility by late September
- Sea at its warmest
Muscat in September — Full Picture
September in Muscat is the last hard month of summer — around 39°C/28°C (102°F/82°F), dry (about 2mm), and still humid, though the heat begins to relent very late in the month.
It stays low season, with cheap rates and few tourists for most of September. Days are organised around the heat — indoors at midday, outdoors only at the edges. The sea is at its warmest of the year.
The encouraging sign is the trend: by the final days of September the worst of the heat starts to break, and wadi hikes and desert trips begin to creep back toward feasibility for the hardy, especially at dawn. The mountains remain the coolest option.
Note: it's still genuinely hot and humid for most of the month, so don't underestimate it. Treat September as late summer rather than autumn until the very end.
What to Wear & What to Pack
Still very hot — around 39°C/28°C (102°F/82°F), beginning to ease late month. Lightweight, loose clothing, a hat, and plenty of water. UV is extreme (10). Headscarf and modest cover-up for the Mosque.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
34°C
24°C
1/mo
Summer (Jun·Jul·Aug)
41.3°C
30.3°C
0/mo
Autumn (Sep·Oct·Nov)
Current35°C
25°C
0.7/mo
Winter (Dec·Jan·Feb)
26°C
17.7°C
2/mo
Muscat Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 25° | 17° | 2d·25mm | 8.5h | 60% | 5 | Busy | Peak |
| February (Best) | 26° | 17° | 2d·20mm | 9h | 60% | 6 | Busy | Peak |
| March (Best) | 29° | 20° | 2d·20mm | 9h | 60% | 8 | Busy | Peak |
| 34° | 24° | 1d·10mm | 9.5h | 55% | 10 | Moderate | Shoulder | |
| 39° | 28° | 0d·5mm | 10.5h | 55% | 11 | Quiet | Low season | |
| 41° | 30° | 0d·2mm | 10.5h | 60% | 11 | Quiet | Low season | |
| 42° | 31° | 0d·2mm | 10h | 65% | 11 | Quiet | Low season | |
| 41° | 30° | 0d·2mm | 10h | 65% | 11 | Quiet | Low season | |
| 39° | 28° | 0d·2mm | 10h | 60% | 10 | Quiet | Low season | |
| 35° | 25° | 1d·8mm | 9.5h | 60% | 8 | Moderate | Shoulder | |
| November (Best) | 31° | 22° | 1d·12mm | 9h | 60% | 6 | Busy | Peak |
| December (Best) | 27° | 19° | 2d·25mm | 8.5h | 60% | 5 | Busy | Peak |
View Other Months
Muscat September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Muscat?
Muscat in September is low. Tourist crowds are quiet and flight/hotel prices are low season.
What's the average temperature in Muscat in September?
Muscat September averages a high of 39°C and a low of 28°C.
Does it rain much in Muscat in September?
Muscat September averages 2mm of rainfall over about 0 rainy days.
What should I wear in Muscat in September?
Still very hot — around 39°C/28°C (102°F/82°F), beginning to ease late month. Lightweight, loose clothing, a hat, and plenty of water. UV is extreme (10). Headscarf and modest cover-up for the Mosque.
What time are sunrise and sunset in Muscat in September?
Muscat September sunrise is 05:45 and sunset is 18:00, with 12h 15min of daylight.
What's the air quality like in Muscat in September?
Muscat September air quality (AQI) averages 74, rated Moderate. PM2.5 averages 37μg/m³.
What activities are recommended in Muscat in September?
In September, Muscat is great for Air-conditioned sights and malls, Hotel pools and warm sea, Late-September dawn wadi visits.
Is September peak season in Muscat?
Muscat September crowds are quiet and prices are low season. You can travel relatively comfortably without long queues.
Best Months to Visit Muscat
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.