St Julian's Weather in September

September in St Julian's averages 27°C (81°F) during the day and 24°C (75°F) at night. The perfect conditions and moderate rainfall make it a solid month to visit.

Rainfall in St Julian's in September

Typically, about 4 days will experience rainfall, with an average of 36 mm (1.4 in) for the month. Rainfall tends to arrive in short, intense showers this month. Rain days are few, but the showers can be surprisingly heavy.

Temperature in St Julian's in September

St Julian's in September has perfect weather. Days reach 27°C (81°F) and nights cool to 24°C (75°F). Experience the summer season in September. Overall, the month follows a fairly predictable daily temperature pattern. At 24°C (75°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.

Sunshine in St Julian's in September

The month enjoys around 269 hours of sunshine, creating mostly sunny days with good weather conditions.

Wind Speed in St Julian's in September

Average wind speeds reach 3 m/s (6 knots) in September, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.

Average water temperature in September

The water is 25°C (77°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit St Julian's.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Malta, check out our St Julian's's climate page.

St Julian's Temperature in September

Min Temperature 24°C (75°F)  

Max Temperature 27°C (81°F)  

Water Temperature 25°C (77°F) *  

Chance of Rain 12%  

Precipitation 36 mm (1.4 in)  

Rainy days 4 days  

Humidity 77% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 269 hours *  

Percentage Sunshine 76% *  

* Data from: Valletta, Malta (3 KM, 2 Miles).

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in St Julian's typically stay consistent throughout September, with daily highs averaging around 27°C (81°F). Nights are warm, with lows typically ranging from 20°C (68°F) to 23°C (73°F).

Average temperatures in September

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for St Julian's in September

Browse day-by-day weather records for St Julian's spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

St Julian's historical weather extremes in September

Based on weather observations in St Julian's between 1976 and 2025, these are the recorded extremes during September.

• St Julian's recorded its highest September temperature of 37°C (99°F) on September 3, 1987.
• St Julian's experienced its chilliest September day on September 27, 2008, reaching only 21°C (70°F).
• The lowest overnight temperature recorded in September was 14°C (57°F) (September 27, 1984).

What to Wear in St Julian's in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Some rain is possible, so pack something to handle light showers. Expect water temperatures of around 25°C (77°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in St Julian's in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Malta, check out our St Julian's's climate page.

More climate data for St Julian's

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full St Julian's climate overview or explore weather in Malta.