Cookie Policy
Last updated: September 11, 2026
What Are Cookies
Cookies are small text files that are placed on your device when you visit our website. They help us provide you with a better experience by remembering your preferences and understanding how you use our site.
How We Use Cookies
BarometricPressure.org uses cookies for the following purposes:
Essential Cookies
These cookies are necessary for the website to function properly. They include:
- Session cookies: Temporary cookies that expire when you close your browser
- Security cookies: Used to detect and prevent security threats
- Load balancing cookies: Ensure website stability and performance
Functional Cookies
These cookies remember your preferences and choices:
- Location preferences: Remember if you've allowed location access
- Unit preferences: Remember if you prefer inHg, mb, or other pressure units
- Recently viewed cities: Quick access to locations you've checked
Analytics Cookies
We use Google Analytics to understand how visitors use our website:
- _ga: Distinguishes unique users (expires after 2 years)
- _gid: Distinguishes unique users (expires after 24 hours)
- _gat: Limits data collection rate (expires after 1 minute)
These cookies collect information anonymously and help us improve our website.
Third-Party Cookies
Some features on our website use third-party services that may set cookies:
- Google Maps/Leaflet: For interactive map functionality
- CloudFlare: For security and performance optimization
- Weather data providers: May set cookies when fetching pressure data
Cookie Duration
| Cookie Name | Purpose | Duration |
|---|---|---|
| bp_location_consent | Remembers location permission choice | 30 days |
| bp_unit_preference | Stores preferred pressure unit | 1 year |
| bp_recent_cities | Stores recently viewed cities | 7 days |
| _ga, _gid | Google Analytics tracking | 2 years / 24 hours |
Managing Cookies
You have control over cookies through your browser settings:
Browser Controls
- Chrome: Settings > Privacy and security > Cookies and other site data
- Firefox: Settings > Privacy & Security > Cookies and Site Data
- Safari: Preferences > Privacy > Manage Website Data
- Edge: Settings > Privacy, search, and services > Cookies and site permissions
Opt-Out Options
- Google Analytics: Install the Google Analytics Opt-out Browser Add-on
- All cookies: Configure your browser to block all cookies (note: this may affect website functionality)
Impact of Disabling Cookies
If you disable cookies, some features may not work properly:
- Location detection may ask for permission each time
- Unit preferences won't be remembered
- Site performance may be affected
- Analytics won't track your visits (which helps us improve)
Updates to This Policy
We may update this Cookie Policy from time to time. We will notify you of any changes by updating the "Last updated" date at the top of this policy.
Contact Us
If you have questions about our use of cookies, please contact us:
Email: privacy@barometricpressure.org
Website: barometricpressure.org/contact
More Information
For more information about cookies and how they work, visit: