Avg High
São Paulo in March
Avg Low
Rain
Daylight
12h
What to expect
São Paulo is in early autumn during March, a shoulder-season stretch where conditions can nudge warmer or cooler week to week. It leans warmly comfortable through the day, and a gentle drop-off once the sun goes down. Conditions tend to feel steady, which makes planning simple. You get a comfortable daylight window for day trips and sightseeing.
March in context
How it compares to the rest of the year in São Paulo.
Hottest (avg)
#4 / 12
Wettest (avg)
#5 / 12
Daylight Hours
#6 / 12
Windiest (avg)
#11 / 12
Highest UV
#6 / 12
Most Humid
#1 / 12
Monthly climate breakdown
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight hours
- 12.2 h
- UV index (max)
- 9
- Typical sun hours
- 06:08 - 18:20
Rain & Snow
- Total rain
-
- Rainy days
- 23 days
- Cloud cover (avg)
- 70%
Humidity & Wind
- Humidity (avg)
- 85%
- Wind (avg)
-
- Wind (max gusts)
-
Daily climate explorer
Day 15 selected for March. Typical high 25.8°C and low 18.8°C.
Typical disruptions in March
Based on 30 years of historical data, these are the disruption patterns most likely to affect plans in March.
Rain High impact
Rain disruption Measures: Likely rain disruption days. Observed about 30% of days (9.2 days/month) in March. Historical risk signal only, not a day-by-day forecast.
9.2 days / month
~30% of days
Why this matters
- Expected days 9.2 days / month
- Probability ~30% of days
- Intensity Up to ~23mm (P95)
Rain disruption risk appears on ~9 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Washout risk Measures: Washout day risk. Observed about 26% of days (8.2 days/month) in March. Historical risk signal only, not a day-by-day forecast.
8.2 days / month
~26% of days
Why this matters
- Expected days 8.2 days / month
- Probability ~26% of days
- Intensity Up to ~23mm (P95)
Washout conditions are possible on ~8 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Heat High impact
Hot feels-like days Measures: Hot feels-like days (>=32C). Observed about 20% of days (6.1 days/month) in March. Historical risk signal only, not a day-by-day forecast.
6.1 days / month
~20% of days
Why this matters
- Expected days 6.1 days / month
- Probability ~20% of days
- Intensity Up to ~35°C (P95)
Feels-like heat >=32C is possible on ~6 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Humidity High impact
Muggy days Measures: Muggy days (dew point >=20C). Observed about 18% of days (5.6 days/month) in March. Historical risk signal only, not a day-by-day forecast.
5.6 days / month
~18% of days
Why this matters
- Expected days 5.6 days / month
- Probability ~18% of days
- Intensity Up to ~21°C (P95)
Muggy conditions are possible on ~6 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Heat High impact
Very hot feels-like Measures: Very hot feels-like days (>=35C). Observed about 2% of days (0.5 days/month) in March. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
~2% of days
Why this matters
- Expected days 0.5 days / month
- Probability ~2% of days
- Intensity Up to ~36°C (P95)
Very hot feels-like conditions are possible on ~1 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Rain Moderate
Heavy rain days Measures: Heavy rain days (>=10mm). Observed about 15% of days (4.7 days/month) in March. Historical risk signal only, not a day-by-day forecast.
4.7 days / month
~15% of days
Why this matters
- Expected days 4.7 days / month
- Probability ~15% of days
- Intensity Up to ~25mm (P95)
Heavy rain is possible on ~5 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Show all disruptions (18 more)
Rain High impact
Washout run Measures: Multi-day washout runs. Observed about 2.0 days/month in March. Historical risk signal only, not a day-by-day forecast.
2.0 days / month
Probability unavailable
Why this matters
- Expected days 2.0 days / month
- Probability —
- Intensity Up to ~23mm (P95)
Multi-day washout runs are possible on ~2 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Very heavy rain Measures: Very heavy rain days (>=25mm). Observed about 1% of days (0.3 days/month) in March. Historical risk signal only, not a day-by-day forecast.
0.3 days / month
~1% of days
Why this matters
- Expected days 0.3 days / month
- Probability ~1% of days
- Intensity Up to ~77mm (P95)
Very heavy rain is possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Visibility Moderate
Fog-likely signal Measures: Fog-likely visibility proxy. Observed about 8% of days (2.5 days/month) in March. Historical risk signal only, not a day-by-day forecast.
2.5 days / month
~8% of days
Why this matters
- Expected days 2.5 days / month
- Probability ~8% of days
- Intensity Up to ~96% (P95)
Fog-likely conditions are possible on ~3 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Heat Moderate
Hot days Measures: Hot days (>=30C). Observed about 3% of days (1.1 days/month) in March. Historical risk signal only, not a day-by-day forecast.
1.1 days / month
~3% of days
Why this matters
- Expected days 1.1 days / month
- Probability ~3% of days
- Intensity Up to ~32°C (P95)
Hot days are possible on ~1 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Humidity Minor
High humidity Measures: High humidity days (RH >=80%). Observed about 87% of days (26.9 days/month) in March. Historical risk signal only, not a day-by-day forecast.
26.9 days / month
~87% of days
Why this matters
- Expected days 26.9 days / month
- Probability ~87% of days
- Intensity Up to ~92% (P95)
High humidity is possible on ~27 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Rain Minor
Wet days Measures: Wet days (>=0.1mm). Observed about 81% of days (25.2 days/month) in March. Historical risk signal only, not a day-by-day forecast.
25.2 days / month
~81% of days
Why this matters
- Expected days 25.2 days / month
- Probability ~81% of days
- Intensity Up to ~18mm (P95)
Measurable rain is possible on ~25 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Humidity Minor
Humid days Measures: Humid days (dew point >=18C). Observed about 72% of days (22.3 days/month) in March. Historical risk signal only, not a day-by-day forecast.
22.3 days / month
~72% of days
Why this matters
- Expected days 22.3 days / month
- Probability ~72% of days
- Intensity Up to ~21°C (P95)
Humid conditions are possible on ~22 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Rain Minor
Rainy hours Measures: Rain-hours signal (>=3h rain). Observed about 69% of days (21.5 days/month) in March. Historical risk signal only, not a day-by-day forecast.
21.5 days / month
~69% of days
Why this matters
- Expected days 21.5 days / month
- Probability ~69% of days
- Intensity Up to ~19h (P95)
Several rainy hours are possible on ~22 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cloud Minor
Cloudy days Measures: Cloudy days (cloud cover >=60%). Observed about 67% of days (20.8 days/month) in March. Historical risk signal only, not a day-by-day forecast.
20.8 days / month
~67% of days
Why this matters
- Expected days 20.8 days / month
- Probability ~67% of days
- Intensity Up to ~100% (P95)
Cloudy skies are possible on ~21 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Wet most of day Measures: Wet-most-of-day signal (>=6h rain). Observed about 44% of days (13.6 days/month) in March. Historical risk signal only, not a day-by-day forecast.
13.6 days / month
~44% of days
Why this matters
- Expected days 13.6 days / month
- Probability ~44% of days
- Intensity Up to ~20h (P95)
Wet-most-of-day conditions are possible on ~14 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cloud Minor
Mostly cloudy days Measures: Mostly cloudy days (cloud cover >=80%). Observed about 41% of days (12.6 days/month) in March. Historical risk signal only, not a day-by-day forecast.
12.6 days / month
~41% of days
Why this matters
- Expected days 12.6 days / month
- Probability ~41% of days
- Intensity Up to ~100% (P95)
Mostly cloudy skies are possible on ~13 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Humidity Minor
Convective risk Measures: Convective storm risk proxy. Observed about 26% of days (8.2 days/month) in March. Historical risk signal only, not a day-by-day forecast.
8.2 days / month
~26% of days
Why this matters
- Expected days 8.2 days / month
- Probability ~26% of days
- Intensity Up to ~21°C (P95)
Convective risk signal appears on ~8 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Wind Minor
Gusty days Measures: Gusty days (>=40 km/h). Observed about 19% of days (5.9 days/month) in March. Historical risk signal only, not a day-by-day forecast.
5.9 days / month
~19% of days
Why this matters
- Expected days 5.9 days / month
- Probability ~19% of days
- Intensity Up to ~54km/h (P95)
Gusty conditions are possible on ~6 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Cloud Minor
Overcast days Measures: Overcast days (cloud cover >=95%). Observed about 18% of days (5.5 days/month) in March. Historical risk signal only, not a day-by-day forecast.
5.5 days / month
~18% of days
Why this matters
- Expected days 5.5 days / month
- Probability ~18% of days
- Intensity Up to ~100% (P95)
Overcast skies are possible on ~6 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Other Minor
Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data Measures: Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data. Observed about 8% of days (2.5 days/month) in March. Historical risk signal only, not a day-by-day forecast.
2.5 days / month
~8% of days
Why this matters
- Expected days 2.5 days / month
- Probability ~8% of days
- Intensity Up to ~96 (P95)
Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data is possible on ~3 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Heat Minor
Feels-like heatwave Measures: Feels-like heatwave runs (>=3 days). Observed about 0.7 days/month in March. Historical risk signal only, not a day-by-day forecast.
0.7 days / month
Probability unavailable
Why this matters
- Expected days 0.7 days / month
- Probability —
- Intensity Up to ~35°C (P95)
Feels-like heatwave runs are possible on ~1 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat Minor
Heat stress risk Measures: High heat stress days. Observed about 2% of days (0.5 days/month) in March. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
~2% of days
Why this matters
- Expected days 0.5 days / month
- Probability ~2% of days
- Intensity Up to ~36°C (P95)
Heat stress is possible on ~1 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Heat Minor
Heatwave run Measures: Heatwave runs (>=3 hot days). Observed about 0.1 days/month in March. Historical risk signal only, not a day-by-day forecast.
0.1 days / month
Probability unavailable
Why this matters
- Expected days 0.1 days / month
- Probability —
- Intensity Up to ~32°C (P95)
Heatwave runs are possible on ~0 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Frequently asked questions
Is March a good time to visit São Paulo?
Typical March days in São Paulo reach highs of 26°C (79°F) with nights around 18°C (64°F). It usually feels warm by day and mild after dark. Overall, March sits in the middle of the São Paulo climate range.
What are temperatures like in March?
Daytime temperatures in March typically peak near 26°C (79°F), while nights drop to around 18°C (64°F). Expect warm afternoons and mild evenings.
How much does it rain in March?
Rainfall in March averages 137 mm (5.4 in) across roughly 23 days. Overall it is a very wet time of year, so a light rain jacket and waterproof shoes are very handy.
How many hours of daylight are there in March?
You can expect about 12 hours of daylight in March. Sunrise is typically around 06:08 and sunset near 18:20. Daylight is fairly typical, with enough time for sightseeing.
How strong is the sun in March?
UV levels frequently reach very high levels (around 9), so strong sun protection is essential, especially around midday.
Is it windy in March?
In March, average wind speeds are around 10 km/h (6 mph), with gusts on the windiest days reaching about 43 km/h (27 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.