Cranston, Rhode Island Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Cranston weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 2Overcast——77°44°—
- WednesdayJun 3Mostly Clear——80°55°+3°
- ThursdayJun 4Overcast——86°57°+6°
- FridayJun 5Overcast——84°60°-2°
- SaturdayJun 6Overcast19%—92°65°+8°
- SundayJun 7Drizzle42%—82°52°-10°
- MondayJun 8Light Drizzle41%—54°51°-28°
Ozone at AQI 45 — peak already passed at 1 PM under partly cloudy skies. AQI up 6 over the last 6 hours (gradual rise). Levels should ease through evening.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 45 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 45
- UV peak
- 0.9 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 45
PM × Wind × Precip
PM2.5 at 6.0 µg/m³, PM10 at 7.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.76
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If bees stay at home, rain will soon come; if they fly away, fine will be the day.
- Moonrise
- 1:58 AM
- Moonset
- 10:35 AM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Cranston at a glance
- Today vs. normal: 72°F — typical for the season
- Last frost: April 27 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Cranston's warmest month is July (~74°F mean) and its coldest is January (~30°F). Rainfall peaks in March (4.9 inches) and bottoms out in July (2.9 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 30° | 4.0″ | 7 |
| February | 32° | 3.4″ | 6 |
| March | 39° | 4.9″ | 7 |
| April | 49° | 4.3″ | 7 |
| May | 59° | 3.4″ | 7 |
| June | 68° | 3.8″ | 6 |
| July | 74° | 2.9″ | 6 |
| August | 73° | 3.6″ | 6 |
| September | 66° | 4.2″ | 6 |
| October | 54° | 4.2″ | 7 |
| November | 45° | 4.3″ | 6 |
| December | 36° | 4.7″ | 8 |
Regional context
Cranston sits within a warm-summer humid continental climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Providence, RI, Warwick, RI, Pawtucket, RI, East Providence, RI, Woonsocket, RI.
Frequently asked
- When does it freeze in Cranston?
- Cranston's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Cranston?
- March is the wettest month with about 4.9 inches of rain on average; the city receives roughly 48 inches annually.
- What is the warmest month in Cranston?
- July is typically warmest, averaging about 74°F.
- What is the coldest month in Cranston?
- January is typically coldest, averaging about 30°F.
- When can I start a vegetable garden in Cranston?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-April); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Cranston get?
- Cranston averages about 79 rainy days per year.
- What hardiness zone is Cranston?
- Cranston's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Cranston, Rhode Island sits in a warm-summer humid continental climate zone. January means hover near 30°F while July averages 74°F — a 44°F seasonal swing.
Across the year, Cranston receives about 48 inches of precipitation spread over roughly 79 rainy days.
The rhythm of the year is set by latitude (41.8°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.