Niteroi Weather: May
 |
Average Day Temperature: | 81.3°F |
|
Average Night Temperature: | 70.6°F |
|
Sea Water Temperature: | 77.7°F |
|
Number of Sunny Days: | 15 days |
| Sunshine Hours: | 10.8 - 11.3 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 0.9 in | |
| detailed information | ||
forecast
| Niteroi |
Temperature
| Niteroi |
Air Temperature in May, °F
The highest day temperature in May 2026 was 93°F. The lowest night temperature was 65°F. The average values for day and night temperatures during May were 79.5°F и 71.2°F respectivly.
Niteroi Water Sea Temperature in May, °F
The average sea surface temperature in May 2026 for Niteroi was 77.8°F. The maximum and minimum values were 76.0°F and 80.0°F respectively.
Most of the days in May are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in May, in
Precipitation total in May for Niteroi is 0.9 in. It makes may one of the least rainy months of the year.
The average wind speed in May is 5.5 mph. This value is relatively stable throughout the year.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Niteroi in May is 6.9 hours.
Niteroi on the Weather Map
| Arroio do Sal |  |
+62 |
| Balneario Pinhal | |
+62 |
| Buzios | |
+68 |
| Florianopolis |  |
+58 |
| Fortaleza |  |
+82 |
| Guaratuba | |
+56 |
| Ilha de Itamaraca |  |
+80 |
| Joao Pessoa | |
+80 |
| Parati | |
+50 |
| Peruibe | |
+60 |
| Recife | |
+80 |
| Rio das Ostras | |
+68 |
| Rio de Janeiro | |
+68 |
| Santos | |
+64 |
| Sao Paulo | |
+58 |
| 1800 |  |
68°F | N 3 mph |
| 2100 | |
66°F | SW 4 mph |
| 0000 | |
62°F | S 6 mph |
| 0300 | |
62°F | S 4 mph |
| 0600 | |
60°F | SW 5 mph |
| 0900 |  |
66°F | S 3 mph |
| 1200 |  |
76°F | W 2 mph |
| 1500 | |
76°F | NW 4 mph |