Byram, Mississippi Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Byram weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——84°69°—
- FridayJun 5Overcast16%—85°64°+1°
- SaturdayJun 6Drizzle84%—81°72°-4°
- SundayJun 7Heavy Drizzle78%—87°70°+6°
- MondayJun 8Light Showers39%—87°71°0°
- TuesdayJun 9Clear27%—90°68°+3°
- WednesdayJun 10Light Drizzle30%—90°68°0°
Ozone at AQI 47 — peak already passed at 1 PM under clear skies. AQI flat over the last 6 hours (within ±3 points). 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 47 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 47
- UV peak
- 3.6 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 47
PM × Wind × Precip
PM2.5 at 7.2 µg/m³, PM10 at 9.5 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 4:07 AM
- Moonset
- 2:24 PM
- In sign
- ♒︎ Aquarius
Fireflies pulse through the magnolias
Byram at a glance
- Today vs. normal: 84°F — typical for the season
- Last frost: February 28 (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 — Byram
SPC has placed Byram in the General Thunderstorms category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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 | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
Byram's warmest month is July (~83°F mean) and its coldest is January (~47°F). Rainfall peaks in April (5.3 inches) and bottoms out in September (3.3 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 47° | 5.1″ | 7 |
| February | 51° | 4.4″ | 7 |
| March | 59° | 4.8″ | 7 |
| April | 66° | 5.3″ | 5 |
| May | 74° | 3.9″ | 6 |
| June | 80° | 3.9″ | 7 |
| July | 83° | 4.7″ | 7 |
| August | 83° | 3.4″ | 6 |
| September | 78° | 3.3″ | 5 |
| October | 67° | 3.6″ | 4 |
| November | 56° | 4.2″ | 6 |
| December | 50° | 4.7″ | 7 |
Regional context
Byram sits within a humid subtropical climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Jackson, MS, Gulfport, MS, Hattiesburg, MS, Southaven, MS, Biloxi, MS.
Frequently asked
- When does it freeze in Byram?
- Byram's last spring frost typically falls around mid-March, and the first fall frost arrives around mid-December.
- What is the rainy season in Byram?
- April is the wettest month with about 5.3 inches of rain on average; the city receives roughly 51 inches annually.
- What is the warmest month in Byram?
- July is typically warmest, averaging about 83°F.
- What is the coldest month in Byram?
- January is typically coldest, averaging about 47°F.
- When can I start a vegetable garden in Byram?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-March); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Byram get?
- Byram averages about 74 rainy days per year.
- What hardiness zone is Byram?
- Byram'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
Byram, Mississippi sits in a humid subtropical climate zone. January means hover near 47°F while July averages 83°F — a 35°F seasonal swing.
Across the year, Byram receives about 51 inches of precipitation spread over roughly 74 rainy days.
The rhythm of the year is set by latitude (32.2°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.