---
title: "Daily charts"
slug: "daily-charts"
updated: 2026-10-08T13:13:35Z
published: 2026-10-08T13:13:35Z
canonical: "kb.solargis.com/daily-charts"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.solargis.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Daily charts

**In this document**

You'll learn how to read the monthly histogram of daily values in the project's Analysis section: what the columns, percentile bands, and cumulative distribution function show, and how to use the chart for system sizing and probabilistic yield estimates.

The **daily charts** of the Solagis Evaluate’s [Analysis section](/v1/docs/data-analysis) show how your project's parameters are distributed across the days of each month. They tell you how often a parameter fell within a given range, which makes them useful for spotting variability and extremes that monthly averages hide.

For the other chart groups and an introduction to the Analysis section, see [How to read the charts](/v1/docs/how-to-read-the-charts).

## Monthly histogram of daily values

|  | **Solar resources** | Climate |
| --- | --- | --- |
| **Chart included for** | GHI, DNI, D2G, GTI | TEMP, RH, TD, WBT, WS, WG, AP, PREC |

The chart represents histograms of daily **summaries/averages** of the given parameters, respectively. Columns depict the percentage of days the parameter was within a certain range, and the black line shows the cumulative distribution function. The percentiles are displayed with dark grey and light grey color bands, respectively.

![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-1783683839027.png?sv=2026-02-06&spr=https&st=2026-10-16T21%3A27%3A52Z&se=2026-10-16T22%3A27%3A52Z&sr=c&sp=r&sig=9Bq81cftFfxRCd2mAfOcVVX500kwodQT7PKRNzuKG50%3D)

|  | **Unit** |
| --- | --- |
| **X-axis** | Respective parameter values |
| **Y-axis (left)** | Percentage value of days in the range (columns) |
| **Y-axis (right)** | Cumulative distribution function (black line) |

### How to use it

This chart reveals **patterns** of variability and extremes, helping to optimize system sizing, anticipate periods of over- or under-production every month, and plan for energy storage or supplementary power needs.

Different percentiles, such as **p90, p50,** and **p75**, provide a range of probabilistic energy yield estimates, helping in PV system design planning by offering a more comprehensive understanding of potential energy production under various conditions, facilitating risk assessment, financial modeling, and ensuring that the system is resilient to variations in solar resource availability.