Granite Bay, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Granite Bay weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——90°65°—
- MondayJul 6Overcast——91°62°+1°
- TuesdayJul 7Overcast——93°54°+2°
- WednesdayJul 8Clear——96°56°+3°
- ThursdayJul 9Clear——99°61°+3°
- FridayJul 10Overcast——102°62°+3°
- SaturdayJul 11Overcast——104°67°+2°
AQI 29 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.0 µg/m³, PM10 at 9.7 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 7.0 µg/m³, PM10 at 9.7 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.72
- 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 the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:24 PM
- Moonset
- 11:23 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Granite Bay at a glance
- Today vs. normal: 74°F — typical for the season
- Last frost: April 9 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 95746
16-Day Forecast — Granite Bay
- Sun90°65°1%
- Mon91°62°1%
- Tue93°54°0%
- Wed96°56°0%
- Thu99°61°0%
- Fri102°62°0%
- Sat104°67°0%
- Sun85°73°1%
- Mon101°67°4%
- Tue108°69°4%
- Wed107°68°2%
- Thu107°69°2%
- Fri110°75°10%
- Sat107°72°10%
- Sun103°72°11%
- Mon102°65°6%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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.
Microseason · July 1–5
Summer heat deepens across the valleys
Inland temperatures exceed 95°F regularly; fire danger reaches moderate to high across most of the region.
Day 186 of 365 · Wedge 37 of 72
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
The year in Granite Bay tops out in July (~76°F) and dips lowest in December (~46°F), with January wettest at 3.7 inches and July driest at 0.0 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 47° | 3.7″ | 6 |
| February | 50° | 3.5″ | 7 |
| March | 54° | 2.6″ | 6 |
| April | 59° | 1.2″ | 3 |
| May | 66° | 0.6″ | 2 |
| June | 73° | 0.2″ | 1 |
| July | 76° | 0.0″ | 0 |
| August | 75° | 0.1″ | 0 |
| September | 72° | 0.1″ | 0 |
| October | 64° | 0.8″ | 2 |
| November | 53° | 1.8″ | 4 |
| December | 46° | 3.3″ | 7 |
Regional context
In Granite Bay, NOAA NCEI 1991-2020 normals put January near 47°F and July near 76°F — a 30°F seasonal arc — with about 18 inches of precipitation over 36 rainy or snowy days.
Granite Bay's moisture rides winter storm tracks: January brings 3.7 inches over 5.9 wet days, while July sees only 0.0 inches across 0.0 days in the dry warm season. That groups Granite Bay with places like Loomis, CA, Rocklin, CA and Orangevale, CA on the same cool-season storm track.
With a coldest-month mean of 46°F, Granite Bay stays mostly frost-free and grows year-round. The July peak near 76°F is Granite Bay's real limit, pushing cool-season vegetables to spring and fall. Granite Bay's coastal lots stay 4-7°F milder overnight than Granite Bay's inland parcels.
Similar climates: Loomis, CA, Rocklin, CA, Orangevale, CA, Penryn, CA, Folsom, CA.
Frequently asked
- When does it freeze in Granite Bay?
- In Granite Bay, expect the last spring frost near mid-April; Granite Bay's first autumn frost comes around mid-November.
- What is the rainy season in Granite Bay?
- January is the wettest month in Granite Bay, about 3.7 inches on average; the year totals roughly 18 inches.
- What is the warmest month in Granite Bay?
- The warmest stretch in Granite Bay comes in July, around 76°F on average.
- What is the coldest month in Granite Bay?
- On average December is the chilliest month in Granite Bay, about 46°F.
- When can I start a vegetable garden in Granite Bay?
- Granite Bay's last frost (mid-April) cues hardy greens; in Granite Bay, hold heat-lovers two weeks past.
- How many rainy days does Granite Bay get?
- Granite Bay records around 36 days of measurable precipitation annually.
- What hardiness zone is Granite Bay?
- Granite Bay's hardiness zone tracks its winter low; with December near 46°F, check the USDA ZIP map for the exact zone.
- What is the 10-day forecast for Granite Bay?
- Granite Bay's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Granite Bay?
- See this week's day-by-day rain chances for Granite Bay in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Granite Bay?
- Current conditions for Granite Bay and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Granite Bay forecast updated?
- The Granite Bay forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Granite Bay?
- Today's sunrise and sunset times for Granite Bay are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Granite Bay?
- The next few days in Granite Bay's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Granite Bay's hot-summer Mediterranean climate in California pairs 47°F Januarys with 76°F Julys, 29°F apart across the seasons.
In a typical year Granite Bay records about 18 inches of precipitation on around 36 days.
The 29°F gap between Granite Bay's summer and winter, at 38.8°N, shapes Granite Bay's frost calendar.
ZIP codes in Granite Bay
- 95746
- 95650