Hartford, Connecticut weather

Local weather, a 7-day forecast and tonight's sky for Hartford, Connecticut.

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Live radar and clouds

Loads a map from RainViewer.com.

Hourly forecast

Next 24 hours. Scroll sideways for later hours.

Daily forecast

Forecast data will come from the selected provider

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Weather details

Current conditions

Sun & moon

Times in the place's local time

About NalssiSky

Local weather, tonight’s sky and ISS passes for a searched place. Full data sources and credits are listed further down this page.

Scene pictures are illustrations, not photographs of current conditions.

Alerts for U.S. places are checked about every 2 minutes while this page is open and visible. This page can be several minutes behind official alerts.

This site’s technology is maintained by EVULNABLE.

Pollen forecasts for U.S. places, where shown, include Google Maps content. Its use is subject to the then-current Google Maps End User Additional Terms of Service and the Google Privacy Policy.

DATA SOURCES

Sources used on this page

What each source provides.

WEATHER & FORECAST

WeatherAPI + Open-Meteo

WeatherAPI.com: current conditions, U.S. hourly forecasts, sun and moon data, and air quality. Open-Meteo: place search (GeoNames data), and hourly and daily forecasts outside the U.S. WeatherAPI.com place search is used only if the Open-Meteo geocoder fails.

U.S. FORECASTS

National Weather Service

Daily forecasts and alerts for U.S. locations.

EUROPEAN WARNINGS

EUMETNET – MeteoAlarm

Official weather warnings from participating National Meteorological and Hydrological Services, for European locations. Warning areas: EUMETNET – MeteoAlarm geocodes (2026-07-31), converted to a grid on this site.

SKY IMAGERY

NASA

EPIC Earth images, and planet and sky images from the NASA image library.

PLANET POSITIONS

JPL Horizons

Planet azimuth, elevation and magnitude for the searched place.

TONIGHT'S SKY

AstronomyAPI

Moon constellation and planets above the horizon at 9 PM local time.

SATELLITE PASSES

N2YO.com

Predicted ISS visible passes for the searched place.

NOTE

Not an emergency service

Coverage and update times vary by place. For hazardous weather, use your local official weather service.

Full data sources

U.S. daily forecasts and alerts: National Weather Service (weather.gov). NWS does not endorse this site.
Rain levels: Environment and Climate Change Canada, Manual of Surface Weather Observation Standards (MANOBS), 8th edition, amendment 2, February 2023. The light, moderate and heavy rain numbers are its rain-rate classes.
Tile words and bars: the pressure change words (steady, slowly, quickly) are the Met Office 3-hour pressure tendency classes. The visibility words use the 1, 3 and 5 mile edges of the U.S. flight categories as a convention, not an official scale. The PM2.5 and PM10 bars use the U.S. EPA 24-hour breakpoints (Technical Assistance Document for the Reporting of Daily Air Quality, EPA-403/B-26-003), applied to the hourly model value for scale only; that is not an air quality index.
U.S. pollen forecast: Google Pollen API. Its source line, terms and privacy links are shown with the pollen data.
Images: NASA (EPIC). NASA does not endorse this site.
Planet positions: NASA/JPL Horizons System
Sky data: AstronomyAPI.com
Satellite data: N2YO.com. Source data: Space-Track (U.S. Space Force); not an endorsement by that agency.
Place search: Open-Meteo geocoding, location data based on GeoNames (CC BY 4.0). WeatherAPI.com search is used only if the geocoder fails.
Weather detail tile pictures: AI-generated with ChatGPT (OpenAI).

Privacy. This page sets no cookies. Your browser keeps your last searched place, up to five recent places, your °F or °C choice, whether you dismissed the iPhone install tip and, for the place you last opened, the last answers received for the Sky tab (local storage), so it can reopen them and show those answers when a data provider does not answer. The Clear saved places button under the search box removes them from this device. The Open this place in Windy link leaves this site: it opens windy.com in a new tab, and Windy's own privacy terms apply there. If you choose Show live radar, an embedded map loads directly from RainViewer.com inside this page: RainViewer receives your IP address and other standard web request information, and its own site analytics run inside that frame; nothing on this page shares your location or activity with RainViewer unless you open it, and opening it sends the place being viewed, rounded to about 11 kilometres, in the map's address. The picture names in the Picture credits list link to NASA's own pages for the pictures; they open in a new tab and nothing is loaded from NASA unless you follow one. Searches and coordinates are sent to this site's server and on to the weather, pollen, satellite and sky data providers listed above, and this includes coordinates from the Use my location control, which only runs if you click it and only after your browser's own permission prompt; those coordinates are rounded to about 110 metres before this site's own code sends or stores them anywhere, so this site's code never sends, keeps or logs your exact device position; that rounding narrows your position to a small area, it does not make it anonymous, and it does not describe what Cloudflare's hosting infrastructure sees as it delivers the request (see below). Cloudflare hosts this site and receives visitor IP addresses to deliver pages and apply a best-effort rate limit. Cloudflare also keeps a sampled record of requests to this site (about 1 in 10) for up to 3 days, to help find and fix errors; a logged record can include the request's address (which can contain a search's text or the rounded coordinates described above), your IP address, your browser's name and version, and Cloudflare's estimate of your approximate location from that IP address. Searches are not added to your browser history. Outside the EU, Cloudflare Web Analytics records visit counts, page load speed, and general details such as the referring site, country, browser and device type; Cloudflare states it uses no cookies and does not collect personal data.

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