Core Weather Parameters (Included)

Tomorrow.io’s Core Offering includes a robust set of 25 foundational weather parameters designed to meet the needs of a wide range of industries and operational scenarios. These parameters offer the essential weather intelligence required to drive decisions across logistics, aviation, public safety, energy, and more.

Included Parameters

Precipitation & Accumulation

These parameters help assess real-time and forecasted precipitation intensity and type, which are critical for operations in transportation, construction, and agriculture.

• Precipitation – Real-time and forecasted intensity of rain, snow, or mixed precipitation
• Accumulation – Includes total accumulation of:
  • Rain
  • Snow
  • Ice
• Snow Depth – Total depth of accumulated snow on the ground
• Global Radar – Observed radar-based precipitation across supported global regions

Temperature & Atmospheric Conditions

Support planning for weather-sensitive tasks and safety management based on how conditions feel and evolve.

• Temperature – Measured ambient air temperature at 2 meters above ground
• Feels Like Temperature (Apparent Temperature) – Perceived temperature influenced by humidity and wind; Reflects heat index above 80°F and wind chill below 40°F
• Dew Point – Temperature at which air reaches saturation; key for fog and condensation risk
• Humidity – Relative humidity percentage, indicating moisture content in the air

Wind Data

Crucial for aviation, marine, and drone operations, as well as any use case involving airborne or exposed environments.

• Wind Speed – Sustained wind speed at 2m
• Wind Gust – Short-term maximum wind bursts
• Wind Direction – Measured in degrees clockwise from true north
• Dynamic Wind – Wind variability or directional changes, useful for energy and aviation

Pressure & Visibility

Support early identification of developing weather systems and safety monitoring for low-visibility conditions.

• Sea Level Pressure – Standardized atmospheric pressure adjusted to sea level
• Surface Level Pressure – Atmospheric pressure at surface elevation
• Visibility – Horizontal visibility distance, in kilometers or miles

Cloud Cover & Storm Data

Useful for air operations, severe weather monitoring, and day-to-day planning.

• Cloud Cover – Fraction of the sky obscured by clouds
• Cloud Base – Altitude of the lowest cloud layer above ground
• Cloud Ceiling – Lowest level at which cloud cover is reported as overcast
• Echo Tops – Height of storm cells derived from radar reflectivity
• Thunderstorm Probability – Likelihood of convective activity within a location or region
• Global Cyclones – Tracks and metadata for tropical cyclones and hurricanes worldwide

Government-Issued & Public Weather Data

Official alerts and classification data from national agencies.

• NWS Weather Type – U.S. National Weather Service condition classification (e.g., drizzle, snow, thunderstorm)
• Government-Issued Severe Weather Events – Real-time official alerts (US, Canada, EU)

Additional Indices

These enhance situational awareness around human comfort and safety.

• Heat Stress Index – Risk indicator for heat-related health impacts, based on temp, humidity, and solar radiation

Access and Availability

• Platform: All core parameters are available on the Map, Trends, Insights, and Alerts interfaces
• API: Nearly all parameters can be queried programmatically via Tomorrow.io’s API. Visit the API documentation for implementation details

Questions?

For more information or help with setup, contact your Account Team or email support@tomorrow.io.