Summer Dec – Feb
Peak warmth: highs of 76–81°F (25–27°C). It's the wettest season, with about 10.6 in (269 mm) of rain, 36% of the year's total. Lows bottom out around 52°F (11°C). January is among the best-scoring months (season average 82/100).
Best time to visit · New South Wales, Australia
Best Time to Visit Blue Mountains
For the most comfortable weather in Blue Mountains, aim for January, March & April and September – November. April tops our comfort score at 90/100, with highs around 64°F (18°C) and 1.9 in (47 mm) of rain. February, May, August and December are good shoulder-season months. The toughest months are June & July, mainly because of cool days.
- Best months
- Jan, Mar & Apr and Sep – Nov
- Shoulder
- Feb, May, Aug and Dec
- Toughest
- Jun & Jul
- Warmest
- Jan · 81°F
- Coldest nights
- Jul · 33°F
- Wettest
- Feb · 4.3 in
- Driest
- May · 1.3 in
Blue Mountains weather by month
Highs run from 49°F to 81°F across the year, and the yearly total is about 29.5 in (749 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 81°F27°C | 76°F25°C | 71°F21°C | 64°F18°C | 56°F13°C | 50°F10°C | 49°F9°C | 52°F11°C | 59°F15°C | 66°F19°C | 72°F22°C | 76°F25°C |
| Avg low | 55°F13°C | 54°F12°C | 50°F10°C | 45°F7°C | 38°F4°C | 35°F2°C | 33°F1°C | 33°F1°C | 38°F4°C | 43°F6°C | 48°F9°C | 52°F11°C |
| Rain | 3.2 in81 mm | 4.3 in110 mm | 3.3 in85 mm | 1.9 in47 mm | 1.3 in33 mm | 2.4 in60 mm | 1.4 in36 mm | 1.6 in41 mm | 1.6 in41 mm | 2.2 in56 mm | 3.2 in81 mm | 3.1 in78 mm |
| Humidity | 61% | 69% | 72% | 74% | 76% | 83% | 80% | 73% | 67% | 63% | 62% | 61% |
| Cloud | 63% | 67% | 63% | 55% | 47% | 53% | 45% | 44% | 47% | 57% | 64% | 64% |
| Comfort | 84 | 79 | 84 | 90 | 80 | 66 | 69 | 74 | 86 | 89 | 84 | 84 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. Temperatures were adjusted from the grid cell's ~875 m (2,871 ft) to Blue Mountains's ~1,022 m (3,353 ft) elevation using the standard lapse rate of 6.5°C per 1,000 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
How we pick the best months
- Temperature (40 pts): full marks for average daytime highs of 64–81°F (18–27°C); minus 3 points per °C below and 4 per °C above.
- Rain (25 pts): full marks up to 40 mm (1.6 in) a month, falling to zero at 250 mm (9.8 in).
- Humidity (15 pts): only counts when it is warm (mean above 18°C); minus 0.75 points per % above 70% relative humidity.
- Cloud (20 pts): full marks at 30% cloud cover or less, falling to zero at 90%.
Best months: within 6 points of the top (or 85+). Shoulder: within 18 and at least 45. Toughest: within 6 of the lowest. Comfort only; crowds, prices, festivals and openings aren't scored.
Blue Mountains season by season
Blue Mountains is in the Southern Hemisphere, so the seasons run opposite to North America and Europe.
Autumn Mar – May
Temperatures slide from 71°F highs in March to 56°F by May. About 6.5 in (165 mm) of rain falls across these months, 22% of the year's total. Lows bottom out around 38°F (4°C). Comfort peaks here: March & April rank with the year's best, and the season averages 85/100.
Winter Jun – Aug
The coldest season, with highs of 49–52°F (9–11°C) and lows down to 33°F (1°C). It's the driest season, with only about 5.4 in (137 mm) of rain, 18% of the year's total. Comfort scores bottom out in June & July; the season averages 70/100.
Spring Sep – Nov
Temperatures climb through the season, from 59°F highs in September to 72°F by November. About 7.0 in (178 mm) of rain falls across these months, 24% of the year's total. Lows bottom out around 38°F (4°C). Comfort peaks here: September – November rank with the year's best, and the season averages 86/100.
What our curated routes say
- Our curated Sydney, Blue Mountains & the Reef route recommends May – Oct. That lines up with the climate data here: May and August – October are among the better-scoring months.
Plan by month
By comfort score: 9 Great and 3 Good. Great months: September – May. Tap a month for its own guide.
Blue Mountains weather questions
When is the best time to visit Blue Mountains?
For the most comfortable weather in Blue Mountains, aim for January, March & April and September – November. April tops our comfort score at 90/100, with highs around 64°F (18°C) and 1.9 in (47 mm) of rain. February, May, August and December are good shoulder-season months. The toughest months are June & July, mainly because of cool days.
What is the rainiest month in Blue Mountains?
February is the wettest month, averaging about 4.3 in (110 mm) of rain. May is the driest, with about 1.3 in (33 mm). The yearly total is around 29.5 in (749 mm).
What is the coldest month in Blue Mountains?
July is the coldest, with average lows of 33°F (1°C) and highs of 49°F (9°C). The warmest is January, with average highs of 81°F (27°C).
Is Blue Mountains humid in summer?
Not very: summer (December – February) humidity averages 64%, and highs peak around 81°F (27°C), so heat matters more than mugginess.
Does it get below freezing in Blue Mountains?
Not on average: even in July, the coldest month, lows average 33°F (1°C). Individual cold snaps can still dip lower.
More on Blue Mountains
Weather nearby
- Sydney weather ~53 mi away
Routes and legs
Pick your Blue Mountains dates together
Poll the group on January, March & April and September – November dates, then plan the days, packing and costs together.