Boston (KBOS) Temperature Market Guide
KBOS • Boston Logan International Airport
IBKR Robinhood
Boston's Logan International Airport (KBOS) offers a ForecastEx temperature prediction market showcasing classic New England coastal weather. Located on a peninsula extending into Boston Harbor, Logan experiences significant maritime influences that distinguish it from inland areas. Understanding the interplay between ocean temperatures and continental air masses is essential for trading this market.
Quick Facts
| Station Code | KBOS |
|---|---|
| Location | Boston, MA |
| Coordinates | 42.3656°N, 71.0096°W |
| Elevation | 20 ft (6 m) |
| Timezone | ET (America/New_York) |
| NWS Office | Boston (BOX) |
| Resolution Source | NWS CLI Report ↗ |
About the KBOS Weather Station
The KBOS ASOS is located at Boston Logan International Airport, uniquely situated on filled tidal flats in Boston Harbor. At just 20 feet elevation, the station is surrounded by water on three sides, making it exceptionally maritime-influenced.
This coastal positioning creates significant differences between Logan temperatures and inland areas. The ocean moderates both summer heat and winter cold, while sea breezes can dramatically affect conditions on otherwise hot days.
This coastal positioning creates significant differences between Logan temperatures and inland areas. The ocean moderates both summer heat and winter cold, while sea breezes can dramatically affect conditions on otherwise hot days.
Boston Climate & Temperature Patterns
Boston experiences a humid continental climate (Koppen: Dfa) modified by Atlantic Ocean influences. The city sits at the transition zone where cold Canadian air masses clash with milder maritime air.
Key Climate Factors:
Ocean Influence: Boston Harbor and the Atlantic Ocean moderate temperatures year-round. Logan is typically cooler in summer and milder in winter than inland suburbs.
Sea Breeze: On warm days, the sea breeze can drop Logan temperatures 10-15°F while inland areas remain hot. This effect is most pronounced in spring and early summer when ocean waters are still cold.
Nor'easters: These powerful coastal storms are a defining feature of Boston weather, bringing heavy snow, rain, wind, and significant temperature impacts.
Key Climate Factors:
Ocean Influence: Boston Harbor and the Atlantic Ocean moderate temperatures year-round. Logan is typically cooler in summer and milder in winter than inland suburbs.
Sea Breeze: On warm days, the sea breeze can drop Logan temperatures 10-15°F while inland areas remain hot. This effect is most pronounced in spring and early summer when ocean waters are still cold.
Nor'easters: These powerful coastal storms are a defining feature of Boston weather, bringing heavy snow, rain, wind, and significant temperature impacts.
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Open Live DashboardSeasonal Trading Considerations
Winter (December - February):
Cold with average highs in the mid-30s°F. Major nor'easters can bring heavy snow and blizzard conditions. The ocean keeps Logan slightly milder than inland areas during extreme cold outbreaks.
Spring (March - May):
Slow warming as the cold ocean keeps temperatures suppressed. The sea breeze becomes a major factor, often preventing Logan from matching inland highs. Late-season nor'easters remain possible through April.
Summer (June - August):
Warm with average highs in the upper 70s to low 80s°F. Heat waves can push temperatures into the 90s, but sea breezes often provide relief at Logan while inland areas swelter.
Fall (September - November):
Pleasant with gradually cooling temperatures. The relatively warm ocean keeps Logan milder than inland areas. Hurricane season can occasionally bring impacts.
Cold with average highs in the mid-30s°F. Major nor'easters can bring heavy snow and blizzard conditions. The ocean keeps Logan slightly milder than inland areas during extreme cold outbreaks.
Spring (March - May):
Slow warming as the cold ocean keeps temperatures suppressed. The sea breeze becomes a major factor, often preventing Logan from matching inland highs. Late-season nor'easters remain possible through April.
Summer (June - August):
Warm with average highs in the upper 70s to low 80s°F. Heat waves can push temperatures into the 90s, but sea breezes often provide relief at Logan while inland areas swelter.
Fall (September - November):
Pleasant with gradually cooling temperatures. The relatively warm ocean keeps Logan milder than inland areas. Hurricane season can occasionally bring impacts.
Boston-Specific Trading Tips
Sea Breeze is Critical: The single biggest factor affecting Logan summer temperatures is whether the sea breeze develops. Wind direction forecasts are essential - onshore flow keeps temperatures down.
Logan vs. Inland: Logan can be 10-15°F cooler than inland areas like Worcester on summer days. Never apply inland forecasts to Logan without adjustment.
Ocean Temperature Matters: The colder the ocean, the stronger the sea breeze potential. Track sea surface temperatures in spring and early summer.
Nor'easter Tracks: The track of coastal storms dramatically affects whether Boston sees rain, snow, or a mix, and how temperatures behave during the storm.
Logan vs. Inland: Logan can be 10-15°F cooler than inland areas like Worcester on summer days. Never apply inland forecasts to Logan without adjustment.
Ocean Temperature Matters: The colder the ocean, the stronger the sea breeze potential. Track sea surface temperatures in spring and early summer.
Nor'easter Tracks: The track of coastal storms dramatically affects whether Boston sees rain, snow, or a mix, and how temperatures behave during the storm.
Market Resolution Details
Boston temperature markets resolve based on the official high temperature in the NWS CLI for station KBOS, issued by the Boston forecast office (BOX).
Resolution Source: NWS CLI (Climatological Report)
Reporting Period: 12:00 AM to 11:59 PM Eastern Standard Time.
Important Note: Logan's coastal location means its temperatures often differ significantly from regional forecasts.
Resolution Source: NWS CLI (Climatological Report)
Reporting Period: 12:00 AM to 11:59 PM Eastern Standard Time.
Important Note: Logan's coastal location means its temperatures often differ significantly from regional forecasts.
Data Release Schedule
Typical release times for key data products at KBOS. Times shown in UTC.
| Data Type | Typical Time (UTC) | Variability |
|---|---|---|
| CLI Report Daily climatological summary |
05:26 UTC | ±46 min |
| 24hr High METAR with max temp |
04:54 UTC | ±1 min |
| METAR Hourly observations |
Hourly at :54 | ±1 min |
| DSM #1 Daily summary message |
00:17 UTC | Issuance time |
| DSM #2 Daily summary message |
20:17 UTC | Issuance time |
| DSM #3 Daily summary message |
21:17 UTC | Issuance time |
| DSM #4 Daily summary message |
20:16 UTC | Issuance time |
6-Hour High/Low Reports
These METARs include 6-hour maximum and minimum temperatures, useful for tracking intraday temperature trends.
05:54 UTC
11:54 UTC
17:54 UTC
23:54 UTC
Note: Times are approximate and may vary. CLI reports are the official resolution source for temperature markets. See NWS Data Guide for more information.
Data Resources
Quick links to official data sources and tools for Boston.
📊 NWS Data
🗄️ Iowa Environmental Mesonet
📈 Wethr.net Tools
Forecasting Challenges
Sea Breeze Prediction: Determining whether and when the sea breeze will develop is challenging. Small changes in large-scale flow patterns can prevent or enhance sea breeze development.
Nor'easter Tracks: Small changes in storm track (measured in tens of miles) dramatically affect whether Boston sees heavy snow, rain, or relatively little precipitation.
Marine Layer: Fog and low clouds can persist at Logan while inland areas are sunny, affecting temperature outcomes.
Nor'easter Tracks: Small changes in storm track (measured in tens of miles) dramatically affect whether Boston sees heavy snow, rain, or relatively little precipitation.
Marine Layer: Fog and low clouds can persist at Logan while inland areas are sunny, affecting temperature outcomes.
Historical Temperature Records
Record High: 104°F recorded in July 1911.
Record Low: -18°F recorded in February 1934.
90°F+ Days: Boston averages about 12-15 days per year at or above 90°F, far fewer than inland areas due to ocean moderation.
Coastal Moderation: Logan's maritime location keeps temperature extremes in check compared to most other Northeast cities.
Record Low: -18°F recorded in February 1934.
90°F+ Days: Boston averages about 12-15 days per year at or above 90°F, far fewer than inland areas due to ocean moderation.
Coastal Moderation: Logan's maritime location keeps temperature extremes in check compared to most other Northeast cities.
📡 Official Data Sources
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