Brookston, Indiana Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Brookston weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——85°55°—
- FridayJun 5Heavy Showers13%0.44″86°64°+1°
- SaturdayJun 6Light Showers80%—82°69°-4°
- SundayJun 7Light Showers43%—82°69°0°
- MondayJun 8Light Showers35%0.04″76°69°-6°
- TuesdayJun 9Light Showers38%—83°68°+7°
- WednesdayJun 10Heavy Drizzle25%0.11″86°71°+3°
Ozone at AQI 93 — peak already passed at 1 PM under clear skies. AQI up 22 in the last 6 hours — air quality is degrading. 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 93 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 93
- UV peak
- 5.3 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 93
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 4:18 AM
- Moonset
- 1:47 PM
- In sign
- ♒︎ Aquarius
Fireflies pulse through the magnolias
Brookston at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: April 20 (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.
SPC Convective Outlook
Storm Prediction Center — Brookston
SPC has placed Brookston in the Marginal Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3MRGLMarginal Risk
Isolated severe storms possible. Limited threat for hail or damaging wind.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
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
Brookston's warmest month is July (~74°F mean) and its coldest is January (~26°F). Rainfall peaks in June (4.6 inches) and bottoms out in February (1.8 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 26° | 2.2″ | 5 |
| February | 30° | 1.8″ | 4 |
| March | 40° | 2.7″ | 6 |
| April | 51° | 3.8″ | 7 |
| May | 62° | 4.0″ | 8 |
| June | 71° | 4.6″ | 8 |
| July | 74° | 4.1″ | 7 |
| August | 72° | 3.1″ | 6 |
| September | 66° | 2.6″ | 5 |
| October | 54° | 2.9″ | 6 |
| November | 41° | 2.9″ | 6 |
| December | 31° | 2.3″ | 5 |
Frequently asked
- When does it freeze in Brookston?
- Brookston's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Brookston?
- June is the wettest month with about 4.6 inches of rain on average; the city receives roughly 37 inches annually.
- What is the warmest month in Brookston?
- July is typically warmest, averaging about 74°F.
- What is the coldest month in Brookston?
- January is typically coldest, averaging about 26°F.
- When can I start a vegetable garden in Brookston?
- 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 Brookston get?
- Brookston averages about 72 rainy days per year.
- What hardiness zone is Brookston?
- Brookston'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
Brookston, Indiana sits in a humid subtropical climate zone. January means hover near 26°F while July averages 74°F — a 48°F seasonal swing.
Across the year, Brookston receives about 37 inches of precipitation spread over roughly 72 rainy days.
The rhythm of the year is set by latitude (40.6°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.