Slovenia · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit Ljubljana are May, June and September, when daytime temperatures are agreeable and rainfall is relatively low.
Ljubljana sees its warmest weather in July, when daytime highs average around 28°C, and its coolest in January (around 4°C).
Annual precipitation totals roughly 1368mm — September is typically the wettest month (~160mm) and January the driest (~67mm).
A distinctly wetter period runs from May to November — worth planning around if you prefer dry days.
July is the sunniest month, with about 285 hours of sunshine.
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 61 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 4° / -2°C | 67mm | 🤔 Fair |
| February | 7° / -1°C | 84mm | 🤔 Fair |
| March | 12° / 2°C | 83mm | 🤔 Fair |
| April | 17° / 6°C | 97mm | 👍 Good |
| May | 22° / 11°C | 114mm | 🌟 Great |
| June | 26° / 14°C | 125mm | 👍 Good |
| July | 28° / 16°C | 122mm | 👍 Good |
| August | 28° / 16°C | 124mm | 👍 Good |
| September | 22° / 12°C | 160mm | 👍 Good |
| October | 16° / 8°C | 150mm | 🤔 Fair |
| November | 10° / 4°C | 138mm | ⚠️ Challenging |
| December | 4° / -1°C | 104mm | ⚠️ Challenging |
January in Ljubljana is cold, with average daytime highs around 4°C (39°F) and nighttime lows near -2°C (29°F). Expect roughly 67mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
☀️ About 70 hours of sunshine over the month (~2h/day).
🎒 What to pack — warm coat · sweaters and layers · scarf
February in Ljubljana is cold, with average daytime highs around 7°C (45°F) and nighttime lows near -1°C (30°F). Expect roughly 84mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
☀️ About 102 hours of sunshine over the month (~3h/day).
🎒 What to pack — warm coat · sweaters and layers · scarf
March in Ljubljana is chilly, with average daytime highs around 12°C (54°F) and nighttime lows near 2°C (36°F). Expect roughly 83mm of precipitation spread over about 8 rainy days, with a moderate amount of rain.
☀️ About 155 hours of sunshine over the month (~5h/day).
🎒 What to pack — jacket or coat · long-sleeve layers
April in Ljubljana is mild, with average daytime highs around 17°C (63°F) and nighttime lows near 6°C (43°F). Expect roughly 97mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
☀️ About 187 hours of sunshine over the month (~6h/day).
🎒 What to pack — light jacket · layers for cool evenings
May in Ljubljana is pleasantly warm, with average daytime highs around 22°C (71°F) and nighttime lows near 11°C (51°F). Expect roughly 114mm of precipitation spread over about 11 rainy days, and this is one of the wetter months.
☀️ About 229 hours of sunshine over the month (~8h/day).
🎒 What to pack — light layers · comfortable walking shoes · compact umbrella or rain jacket
June in Ljubljana is warm, with average daytime highs around 26°C (78°F) and nighttime lows near 14°C (58°F). Expect roughly 125mm of precipitation spread over about 10 rainy days, and this is one of the wetter months.
☀️ About 249 hours of sunshine over the month (~8h/day).
🎒 What to pack — light summer clothing · sunscreen and sunglasses · compact umbrella or rain jacket
July in Ljubljana is warm, with average daytime highs around 28°C (82°F) and nighttime lows near 16°C (61°F). Expect roughly 122mm of precipitation spread over about 9 rainy days, and this is one of the wetter months.
☀️ About 285 hours of sunshine over the month (~10h/day).
🎒 What to pack — light summer clothing · sunscreen and sunglasses · compact umbrella or rain jacket
August in Ljubljana is warm, with average daytime highs around 28°C (82°F) and nighttime lows near 16°C (61°F). Expect roughly 124mm of precipitation spread over about 9 rainy days, and this is one of the wetter months.
☀️ About 262 hours of sunshine over the month (~9h/day).
🎒 What to pack — light summer clothing · sunscreen and sunglasses · compact umbrella or rain jacket
September in Ljubljana is pleasantly warm, with average daytime highs around 22°C (71°F) and nighttime lows near 12°C (53°F). Expect roughly 160mm of precipitation spread over about 9 rainy days, and this is one of the wetter months.
☀️ About 171 hours of sunshine over the month (~6h/day).
🎒 What to pack — light layers · comfortable walking shoes · compact umbrella or rain jacket
October in Ljubljana is mild, with average daytime highs around 16°C (61°F) and nighttime lows near 8°C (46°F). Expect roughly 150mm of precipitation spread over about 9 rainy days, and this is one of the wetter months.
☀️ About 113 hours of sunshine over the month (~4h/day).
🎒 What to pack — light jacket · layers for cool evenings · compact umbrella or rain jacket
November in Ljubljana is chilly, with average daytime highs around 10°C (49°F) and nighttime lows near 4°C (39°F). Expect roughly 138mm of precipitation spread over about 10 rainy days, and this is one of the wetter months.
☀️ About 52 hours of sunshine over the month (~2h/day).
🎒 What to pack — jacket or coat · long-sleeve layers · compact umbrella or rain jacket
December in Ljubljana is cold, with average daytime highs around 4°C (40°F) and nighttime lows near -1°C (30°F). Expect roughly 104mm of precipitation spread over about 9 rainy days, with a moderate amount of rain.
☀️ About 53 hours of sunshine over the month (~2h/day).
🎒 What to pack — warm coat · sweaters and layers · scarf