Observation Real-time and Historical Solar Data API

For PV monitoring or data analysis

Analysis
Operation & Monitoring
-5 years
-7 days
now

Observe, analyze, act.

Monitor in realtime.

/observation/realtime provides high-resolution radiation data almost anywhere on the globe. We make sure that our satellite-based observations are available as quickly as possible, so you can monitor your infrastructure in realtime. Know exactly what's happening, as it's happening.

Understand the past.

/observation/historical delivers the most accurate view of past conditions. The data is continually refined and improved as better satellite information becomes available.

At a glance.

Everywhere

Available anywhere on the globe.

Realtime

Rapid updates of data. Hourly, 15-minute, and 1-minute resolutions.

Historical

Best data for the last 5 years, continually refined. Hourly, 15-minute, and 1-minute resolutions.

Advanced

Tilt, azimuth, and shading due to horizon are taken into account.

Parameters

GHI

Global horizontal irradiance

DIR

Direct horizontal irradiance

DHI

Diffuse horizontal irradiance

DNI

Direct normal irradiance

GTI

Global tilted irradiance

BTI

Direct tilted irradiance

DTI

Diffuse tilted irradiance

PV

PV production

Ta

Air temperature

snow

Snow depth

Available Variants

clear sky

horizon shading

Getting started.

Explore our live Observation demo with real location data – no account required.

Try Demo

Browse our Observation API Documentation to explore available endpoints.

View API Specs

It's time to get the most out of your PV system.

Let's do business together.

To use the Observation API simply buy Meteonorm API Tokens. Tokens are usable across all Meteonorm API products, so you can use the services you need, without a hassle.

Pricing

Endpoint

Tokens per request

/observation/realtime
1
/observation/historical
200*

* For a request period of 1 year. Durations other than one year are calculated proportionally. For example, 6 months correspond to 100 tokens. The value is rounded up to the nearest whole number.

Bundles

Do you need data for one project or want to test the API for your specific locations and needs? Bundles are a great way to get started. You buy a set amount of tokens that you can use as you like. And don't worry, you can always buy more.

S

Tokens*
2000
Price (CHF)
90.–
Enough for
2000
Realtime requests
— or —
10
Historical requests

Buy

M

Tokens*
30 000
Price (CHF)
600.–
Enough for
30 000
Realtime requests
— or —
150
Historical requests

Buy

L

Tokens*
100 000
Price (CHF)
1000.–
Enough for
100 000
Realtime requests
— or —
500
Historical requests

Buy

Plans

Do you need data regularly and want to take advantage of more competitive pricing? Our plans renew your set amount of tokens every month. Great value for money.

S

Tokens/month
10 000
Price/year (CHF)
960.–
Enough for
10 000
Realtime requests
— or —
50
Historical requests

per month

Buy

M

Tokens/month
100 000
Price/year (CHF)
2400.–
Enough for
100 000
Realtime requests
— or —
500
Historical requests

per month

Buy

L

Tokens/month
1 000 000
Price/year (CHF)
4800.–
Enough for
1 000 000
Realtime requests
— or —
5000
Historical requests

per month

Buy

You can combine multiple plans and bundles, e. g. 2 x plan L.

Custom Offer

Have requirements that go beyond the standard?
Whether you're an educational institution, an ambitious startup, or you're running a data-hungry app with unpredictable spikes — we're ready.
Let's build the solution that fits you.

Contact us

Frequently Asked Questions

What is Meteonorm Observation and what value does it offer?

Meteonorm Observation delivers high-accuracy, historical, and near-real-time weather and solar radiation observations for any location worldwide. Its primary value lies in continuous PV performance monitoring, target-vs-actual yield analyses, and operational validation of building and energy systems.

Which use cases are Meteonorm Observation data best suited for?

Meteonorm Observation serves as the primary data foundation for:
  • PV Performance Monitoring: Automated monitoring of solar farms and rooftop systems to quickly identify yield losses and component outages.
  • Target-vs-Actual Comparisons: Matching energy yield or building energy consumption against actual observed weather.
  • Quality Control & Audits: Objective proof of weather extremes, outage causes, and warranty claims.

Which parameters and temporal resolutions does Meteonorm Observation offer?

All key radiation components (GHI, DNI, DHI, GTI) as well as temperature and snow depth are available. A complete list of parameters can be found in the Documentation.
Time series are available in hourly, 15-minute, or 1-minute (interpolated) resolutions up to near-real-time.

In which formats and through which platforms are Meteonorm Observation data available?

Meteonorm Observation data can be exported in JSON or CSV format through the Meteonorm API.

How much do Meteonorm Observation data cost and how does the token system work?

For the Meteonorm API, billing is flexible via a token system with different prices depending on the product:
  • 1 Observation Real-Time request = 1 token
  • 1 Observation Historical request = 200 tokens/year
Available options for sale are:
  • Bundles (One-time purchase): Starting at CHF 90 (2,000 tokens, i.e., 2,000 Observation Real-Time, valid for 4 years) for single projects.
  • Plans (Subscriptions): Starting at CHF 960/year (10,000 tokens/month, i.e., 10,000 Observation Real-Time per month) for regular requirements.

Are Meteonorm Observation data available through the Meteonorm Web App?

No, the Meteonorm Observation data are available only through the Meteonorm API.